Bio-Rad Bio-Plex Pro Human Cancer Biomarker Assays User Manual

Bio-Plex Pro

™

Human

Cancer Biomarker Assays

Instruction Manual

For technical support, call your local Bio-Rad office, or in the U.S., call 1-800-424-6723.
For research use only. Not for diagnostic procedures.

Table of Contents

Introduction 1

Principle 2

Kit Contents and Storage 4

Recommended Materials 5

Assay Workflow 6

lmportant Considerations 7

Detailed Instructions 7

1. Plan Plate Layout 8

2. Prepare Instrument 9

3. Prepare Wash Method 10

4. Prepare Standards and Controls 11

5. Prepare Samples 13

6. Prepare Coupled Beads 16

7. Run Assay 17

8. Read Plate 21

Troubleshooting Guide 29

Plate Layout Template 34

Calculation Worksheet 35

Safety Considerations 37

Legal Notices 37

Ordering Information 38

Introduction

Bio-Plex Pro™ Human Cancer Biomarker Assays

Bio-Plex Pro human cancer biomarker assays are designed to meet
the needs of the most demanding preclinical and clinical research
environments. These magnetic bead–based multiplex immunoassays
include a unique blend of soluble biomarkers involved in disease
processes such as angiogenesis, metastasis, inflammation, cell
proliferation, cell adhesion, and apoptosis. With diluents optimized
for enhanced performance in clinical matrices, a fast protocol, and a
flexible kit format, the human cancer biomarker assays promise to make
multiplexing easier and more reliable than ever.

Multiplexing with Bio-Plex Pro Assays

Bio-Plex Pro assays enable researchers to quantify multiple protein
biomarkers in a single well of a 96-well plate in just three to four hours.
These robust immunoassays require as little as 12.5 µl of serum or
plasma or 50 µl of other biological fluid. The use of magnetic (MagPlex)
beads allows researchers to automate wash steps on a Bio-Plex Pro (or
similar) wash station. Magnetic separation offers greater convenience and
reproducibility compared to vacuum filtration.

For more information please visit www.bio-rad.com/bio-plex.

1

Principle

Technology

The Bio-Plex

®

suspension array system is built upon the three core

elements of xMAP technology:

n

Fluorescently dyed microspheres (also called beads), each with a distinct

color code or spectral address to permit discrimination of individual tests
within a multiplex suspension. This allows simultaneous detection of more
than 100 different types of molecules in a single well of a 96-well microplate

n

A dedicated flow cytometer with two lasers and associated optics to

measure the different molecules bound to the surface of the beads

n

A high-speed digital signal processor that efficiently manages the

fluorescence data

Assay Format

Bio-Plex Pro

™

human cancer assays are essentially immunoassays
formatted on magnetic beads. The assay principle is similar to that of
a sandwich ELISA (Figure 1). Capture antibodies directed against the
desired biomarker are covalently coupled to the beads. Coupled beads
react with the sample containing the biomarker of interest. After a series
of washes to remove unbound protein, a biotinylated detection antibody
is added to create a sandwich complex. The final detection complex is
formed with the addition of streptavidin-phycoerythrin (SA-PE) conjugate.
Phycoerythrin serves as a fluorescent indicator, or reporter.

2

Biomarker
of Interest

Streptavidin

Magnetic Bead

Capture

Antibody

Fig. 1. Bio-Plex sandwich immunoassay.

Biotinylated

Detection

Antibody

Phycoerythrin

Fluorescent

Reporter

Data Acquisition and Analysis

Data from the reactions are acquired using a Bio-Plex system or similar
Luminex-based reader. When a multiplex assay suspension is drawn into
the Bio-Plex 200 reader, for example, a red (635 nm) laser illuminates
the fluorescent dyes within each bead to provide bead classification
and thus assay identification. At the same time, a green (532 nm)
laser excites PE to generate a reporter signal, which is detected by a
photomultiplier tube (PMT). A high-speed digital processor manages
data output, and Bio-Plex Manager

™

software presents data as median
fluorescence intensity (MFI) as well as concentration (pg/ml). The
concentration of analyte bound to each bead is proportional to the MFI
of the reporter signal.

3

Kit Contents and Storage

Reagents Supplied

Bio-Plex Pro

™

human cancer biomarker assays are available in a
convenient all-in-one kit format that includes assay, reagent, and diluent
components in a single box.

Table 1. Contents of 1 x 96-well premixed and custom x-Plex™ kits.

**

Component

Standard diluent HB

Sample diluent HB

Assay buffer

Wash buffer

Detection antibody diluent

Streptavidin-PE (100x)

Assay plate (96-well flat bottom plate or filter plate)

Sealing tape

Assay Quick Guide

Coupled magnetic beads (20x)

Detection antibodies (20x)

Standard

Quality Control High*

Quality Control Low

* Only premixed cancer panels and custom cancer x-Plex™ kits include quality controls.
** Volumes shown are approximate. Quantities in Express assays will vary.

*

Quantity

1 bottle (10 ml)

1 bottle (8 ml)

1 bottle (50 ml)

1 bottle (200 ml)

1 bottle (5 ml)

1 tube

1 plate

1 pack of 4

1 booklet

1 tube

1 tube

1 vial

1 vial

1 vial

Storage and Stability

Kit contents should be stored at 4°C and never frozen. Coupled magnetic
beads and streptavidin-PE should be stored in the dark. All components
are guaranteed for a minimum of six months from the date of purchase
when stored as specified.

4

Table 2. Recommended materials.

Item

Bio-Plex Pro Assays Quick Guide 1

Ordering Information

Bulletin #100-22581 (download
at www.bio-rad.com/bio-plex)

®

Bio-Plex

Bio-Plex validation kit

200 system or Luminex system with HTF

Bio-Rad catalog #171-000205

Bio-Rad catalog #171-203001

Note: Run the validation kit monthly to ensure optimal

performance of fluidics and optics systems

Bio-Plex calibration kit

Bio-Rad catalog #171-203060

Note: Run the calibration kit daily to standardize

fluorescence signal

Bio-Plex Pro wash station

Bio-Rad catalog #300-34376

For use with magnetic bead-based assays only

Bio-Plex Pro II wash station

Bio-Rad catalog #300-34377
For use with both polystyrene (nonmagnetic) and magnetic
bead-based assays

Bio-Plex handheld magnetic washer

Bio-Rad catalog #170-20100
For use with magnetic bead–based assays only

Bio-Plex Pro flat bottom plates (forty 96-well plates)

Bio-Rad catalog #171-025001
For magnetic separation on the Bio-Plex Pro wash station

Microtiter plate shaker

IKA MTS 2/4 shaker for 2 or 4 microplates

IKA catalog #320-8000
or
Barnstead/Lab-Line Model 4625 plate

VWR catalog #57019-600
shaker (or equivalent capable of 300–1,100 rpm)

®

Bio-Rad

Aurum™ vacuum manifold

Bio-Rad catalog #732-6470
For vacuum filtration

BR-2000 vortexer

Reagent reservoirs, 25 ml

For capture beads and detection antibodies

Reagent reservoir, 50 ml (for reagents and buffers)

Pall Life Science Acrodisc: 25 mm PF syringe filter

(0.8/0.2 µm Supor membrane)

Filter plate, 1 x 96 with clear plastic lid and tray

Bio-Rad catalog #166-0610

VistaLab catalog #3054-1002

or

VistaLab catalog #3054-1004

VistaLab catalog #3054-1006

Pall Life Sciences

catalog #4187

Bio-Rad catalog #171-304502

Other: 15 ml polypropylene tubes for reagent dilutions, calibrated pipets, pipet tips, sterile
distilled water, aluminum foil, absorbent paper towels, 1.5 or 2 ml microcentrifuge tubes, and
standard flat bottom microplate (for calibrating vacuum manifold).

5

Assay Workflow

Prewet wells

(for lter plate only)

Add 50 μl 1x beads to wells

Wash 2 x 100 μl

Add 50 μl standards, samples, controls,

incubate 1 hr at RT with shaking at 850 rpm

Wash 3 x 100 μl

Add 25 μl 1x detection antibody, incubate

30 min at RT with shaking at 850 rpm

Wash 3 x 100 μl

Add 50 μl 1x streptavidin-PE, incubate

10 min at RT with shaking at 850 rpm

Wash 3 x 100 μl

Resuspend in 125 μl assay buffer,

shake at 850 rpm for 30 sec

Acquire data on Bio-Plex system

6

lmportant Considerations

Instruments and Software

The Bio-Plex Pro

™

assays described in this manual are compatible with
all currently available Luminex-based life science research instruments.
Assays can be read and analyzed with either Bio-Plex Manager

™

software

or Luminex xPONENT software (section 8).

Assay Procedures

Please pay close attention to vortexing, shaking, and incubation times
and to Bio-Plex

®

reader PMT (RP1) setting, as these have been optimized

specifically for each assay panel.

Assay Quick Guide

Each assay kit comes complete with a printed Bio-Plex Pro

™

Assay Quick Guide

(bulletin #10022581), which can be used to prepare and run a full 1 x 96-well
assay plate. Users can also download a copy at www.bio-rad.com/bio-plex.

Bead Regions and Multiplexing Compatibility

n

Bead regions for all analytes are listed in the Read Plate section.

n

It is not recommended to mix analytes between the different

cancer panels, or with other Bio-Plex assay panels or reagent kits.
For example:

a. Receptors should not be mixed with their ligands
b. Overlapping analytes in different antigen standards should not be mixed

c. Bio-Plex Pro reagent kit II contains diluents that have not been fully

validated in other assays

In each case, standard curves and sample values may be inaccurate.

Detailed Instructions

The following pages provide detailed instructions for each step of the
assay procedure, including preparation, running the assay, and reading the
plate with Bio-Plex Manager

7

™

and Luminex xPONENT software.

1. Plan Plate Layout

Prior to running the assay, determine the total number of wells in the
experiment using the Plate Layout Template on page 34 or the Plate
Formatting tab in Bio-Plex Manager
in Figure 2, with all conditions in duplicate.

1. Assign standards to columns 1 and 2, with the highest
concentration in row A and the lowest concentration in row H.

2. Assign the blank to wells A3 and A4. The blank should consist of your

chosen standard diluent. Note that Bio-Plex Manager automatically
subtracts the blank (B) MFI value from all other assay wells.

3. User-specified controls, as well as the quality controls supplied in

premixed cancer biomarker kits, are assigned to wells in columns 3 and 4.

4. The remainder of the plate is available for samples.

5. Once the total number of wells is known, you can calculate the

required volumes of beads, detection antibody, and streptavidin-PE.
Use Tables 6, 9, and 11, respectively, or the Calculation Worksheet on
pages 35–36.

Fig. 2. Suggested plate layout. For detailed instructions on
plate formatting in Bio-Plex Manager, see section Read Plate. Legend

S Standard

™

. A suggested plate layout is shown

B Blank

X Samples

C Controls

8

2. Prepare Instrument

Start up and calibrate the Bio-Plex® system with Bio-Plex Manager™
software prior to setting up the assay. The calibration kit should be run
daily or before each use of the instrument to standardize the fluorescent
signal. For instructions on using other xMAP system software packages,
contact Bio-Rad Technical Support.

The validation kit should be run monthly to ensure optimal performance of
fluidics and optics systems. Refer to either the software manual or online
Help for directions on how to conduct validation.

Start Up System (Bio-Plex 100, 200, or similar)

1. Empty the waste bottle and fill the sheath fluid bottle before starting

if high throughput fluidics (HTF) are not present. This will prevent
fluidic system backup and potential data loss.

2. Turn on the reader, XY platform, and HTF (if included). Allow the
system to warm up for 30 min (if not already done).

3. Select Start up and follow the instructions. If the system is idle
for 4 hr without acquiring data, the lasers will automatically turn off.
To reset the 4-hr countdown, select Warm up and wait for the
lasers/optics to reach operational temperature.

Calibrate System

1. Select Calibrate and confirm that the default values for CAL1
and CAL2 are the same as the values printed on the bottle of
Bio-Plex calibration beads. Use the Bio-Plex system low RP1
target value.

2. Select OK and follow the software prompts for step-by-step
instructions for CAL1 and CAL2 calibration.

Note! In Bio-Plex Manager version 6.1 and higher, startup, warm up,

and calibration can be performed together by selecting the “Start up and
calibrate” icon.

9

3. Prepare Wash Method

Bio-Plex Pro assays are compatible with both magnetic separation and
vacuum filtration methods. However, for best results, we recommend
performing the assays in a flat bottom plate with magnetic separation.

Table 3. Summary of compatible wash stations and plate types.

Wash Method Wash Station Assay Plate

Magnetic separation Bio-Plex Pro
Bio-Plex Pro II (use MAG programs)
Bio-Plex handheld magnetic washer

Vacuum filtration Bio-Plex Pro II (use VAC programs) Filter plate
Vacuum manifold (manual)

Setting up the Bio-Plex Pro or Bio-Plex Pro II
Wash Station

The wash station does not require calibration; however, it should be primed
before use. For more information, refer to the Bio-Plex Pro and Pro II wash
station quick guide (bulletin #5826).

1. Install the appropriate plate carrier on the wash station.

2. Use the Prime procedure to prime channel 1 with wash buffer.

Setting up the Bio-Plex Handheld Magnetic Washer

Place an empty flat bottom plate on the magnetic washer by sliding it
under the retaining clips. Push the clips inward to secure the plate. Make
sure the plate is held securely. If needed, the clips can be adjusted for
height and tension. For detailed instructions, refer to the user guide
(bulletin #10023087).

™

Flat bottom plate

Setting up a Vacuum Manifold

Calibrate the vacuum manifold by placing a standard 96-well flat bottom
plate on the unit and adjusting the pressure to –1 to –3" Hg. In general,
100 µl liquid should take 3–4 sec to clear the well. For more detailed
instructions, refer to bulletin #10005042.

10

4. Prepare Standards and Controls

General Instructions

n

It is essential to prepare standards and quality controls (if included)

exactly as described in this section. Incorrect preparation may lead to
low signal or variable measurements from plate to plate

n

The product data sheet or peel-off sticker provided with the standards

lists the most concentrated point on the standard curve (S1). Enter this
information into Bio-Plex Manager

Using the Quality Controls (optional)

Two-level quality controls (high and low) are included with premixed
cancer biomarker panels and custom x-Plex
for monitoring the day-to-day quality of assay results.

Selecting a Diluent for Standards and Controls

Refer to Table 4 for recommended diluents based on different sample types.

™

software as instructed in section 8

™

kits. Their use is intended

In order to meet the lot-specific control ranges provided on the product data
sheet, both the standards and controls should be reconstituted in Bio-Plex

®

standard diluent HB. If reconstituting in a different diluent, users will need to
establish/validate their own control ranges or acceptance criteria.

Table 4. Summary of recommended diluents for standards and controls.

Diluent for Standards
Sample Type and Controls* Add BSA

Serum and plasma Standard diluent HB None

Culture media, with serum Culture medium None

Culture media, serum-free Culture medium To 0.5% final**

Lavage, sputum, other fluids Sample diluent HB To 0.5% final**

Lysate Sample diluent HB To 0.5% final**

* If using diluents other than standard diluent HB, users must establish their own control ranges.
** At least 0.5% final BSA is recommended to stabilize analytes and reduce adsorption to labware.

11

Reconstitute Standards and Quality Controls

This procedure prepares enough standard to run each dilution in duplicate.

1. Gently tap the vial containing the lyophilized standards on a solid
surface to ensure the pellet is at the bottom of the vial.

2. Reconstitute a single vial of standards with 781 µl of the appropriate

diluent. Optional: at the same time, reconstitue the two control vials
with 250 µl of the appropriate diluent as summarized in Table 4.
Controls do not require further dilution.

3. Gently vortex the reconstituted standards and controls for 5 sec,

then incubate on ice for 30 min. It is important that reconstitution
of standards and controls is started and ended at the same time.
Be consistent with this incubation time to ensure optimal assay
performance and reproducibility.

4. During the incubation period, prepare the samples as instructed in the
Prepare Samples section.

Prepare the Standard Dilution Series

The following procedure produces an eight-point standard curve with a
fourfold dilution between each point. Pipet carefully using calibrated pipets
and use a new pipet tip for every volume transfer.

1. Label eight 1.5 ml polypropylene tubes S2 through S8 and Blank.

2. Add 150 µl of the appropriate diluent to tubes S2–S8 (Figure 3).

3. Vortex reconstituted standards gently for 5 sec before removing

any volume. Transfer 50 µl to the S2 tube containing the chosen
standard diluent. Vortex for 5 sec.

4. Use a new pipet tip to transfer 50 µl from the S2 tube to the
S3 tube. Vortex for 5 sec.

5. Continue with 1:4 (fourfold) serial dilutions as shown in Figure 3.

12

6. Use reconstituted and diluted standards and controls immediately. Do

not freeze for future use.

Fig. 3. Preparing a fourfold dilution series with a single reconstituted standard.

50 50 50 50 50 50 50

Reconstituted

Standard

150 150 150 150 150 150 150 150

S1 S2 S3 S4 S5 S6 S7 S8 Blank

Transfer Volume, µl

Diluent, µl

5. Prepare Samples

General guidelines for preparing different sample types are provided
here. For more information, consult publications listed in Bio-Rad bulletin
#5297, available for download at www.bio-rad.com, or contact Bio-Rad
Technical Support.

n

Once thawed, keep samples on ice. Prepare dilutions just prior to the

start of the assay and equilibrate to room temperature before use

n

Do not freeze diluted samples

Table 5. Summary of recommended sample diluents and dilution factors.

Sample Type Diluent Add BSA Sample Dilution*

Serum and plasma Sample diluent HB None Fourfold (1:4)

Culture media,
with serum Culture media None User optimized (neat to 1:10)

Culture media,
serum-free Culture media To 0.5% final* User optimized (neat to 1:10)

Lavage, sputum,
other fluids Sample diluent HB To 0.5% final* User optimized (neat to 1:10)

User optimized (at least 1:2 for
Lysate Sample diluent HB To 0.5% final* 50 to 500 µg/ml final protein)

* At least 0.5% final BSA is recommended to stabilize analytes and reduce adsorption to labware.

13

Sample Preparation

Serum and Plasma

EDTA or citrate is preferred as an anticoagulant. Heparin-treated plasma,
while compatible with Bio-Plex Pro
proteins of interest. Avoid using hemolyzed samples as this may lead to
false positive results.

1. Draw whole blood into collection tubes containing anticoagulant.
Invert tubes several times to mix.

2. For serum, allow blood to clot at room temperature for 30 to 45 min.

For plasma, proceed directly to the centrifugation steps.

3. Perform centrifugation at 1,000 x g for 15 min at 4°C and transfer the
serum or plasma to a clean polypropylene tube.

4. To completely remove platelets and precipitates, centrifuge again at
10,000 x g for 10 min at 4°C.

5. Dilute samples fourfold (1:4) by adding 1 volume of sample to 3

volumes of Bio-Plex

®

sample diluent HB (for example, 40 µl sample +

120 µl sample diluent).

6. Assay samples immediately or aliquot into single-use tubes and store
at –70°C. Avoid repeated freeze-thaw cycles.

Cell Culture Supernatant

1. Collect supernatants and centrifuge at 1,000 x g for 15 min at 4°C.
For cell lines cultured in serum-free culture media, collect
samples and add BSA as a carrier protein to a final concentration
of at least 0.5% to stabilize protein analytes and to prevent
adsorption to labware.

2. Transfer to a clean polypropylene tube. If cellular debris or precipitates
are present, centrifuge again at 10,000 x g for 10 min at 4°C.

3. We recommend testing undiluted samples first. If levels are

anticipated to be high, samples can be further diluted in culture
medium. Rarely would samples need to be diluted greater than 1:10.

4. Assay immediately or store samples in single-use aliquots at –70°C.
Avoid repeated freeze-thaw cycles.

™

assays, may absorb certain soluble

14

Lavage, Sputum, and Other Biological Fluid Samples

Keep all samples on ice until ready for use. The appropriate sample
dilution factor should be optimized by the user.

1. If required, dilute the sample in Bio-Plex sample diluent with BSA

added to a final concentration of 0.5%.

2. Centrifugation at 10,000 x g for 10 min at 4°C may be required to

clarify the sample.

Lysates

The Bio-Plex cell lysis kit is required for lysate preparation (available
separately, catalog #171-304011 and #171-304012). Refer to bulletin #5297
for a list of published articles on cytokine analysis in tissue samples.

1. Prepare the cell or tissue lysates according to the instructions

provided with the Bio-Plex cell lysis kit. The protease inhibitors factor I
and factor II are included in the kit. PMSF needs to be added to lysis
buffer at a final concentration of 2 mM. The lysates should be free of
particulate matter.

2. Determine the total protein concentration of the lysate. It may be

necessary to test lyse your samples with different volumes of lysing
solution to obtain the specified protein concentration range.

3. Dilute at least 1:2 in sample diluent + 0.5% BSA, to a final protein

concentration of 50–500 µg/ml.

For optimum antibody binding during sample incubation, it is

important to dilute lysates as much as possible to reduce the
detergent concentration.

4. If the lysate is not tested immediately, store at –20°C. Lysates are
stable for up to five freeze-thaw cycles.

15

6. Prepare Coupled Beads

1. Use Tables 6–7 or the Calculation Worksheet on page 35 to calculate

the volume of coupled beads and assay buffer needed.

2. Add the required volume of Bio-Plex
polypropylene tube.

3. Vortex the 20x stock of coupled beads at mid speed for 30 sec.

Carefully open the cap and pipet any liquid trapped in the cap back
into the tube. This is important to ensure maximum bead recovery.
Do not centrifuge the vial; doing so will cause the beads to pellet.

4. Dilute coupled beads to 1x by pipetting the required volume into the

15 ml tube. Vortex.

Each well of the assay requires 2.5 μl of the 20x stock adjusted to a

final volume of 50 μl in assay buffer.

5. Protect the beads from light with aluminum foil. Equilibrate to room
temperature prior to use.

Note! To minimize volume loss, use a 200–300 μl capacity pipet to remove

beads from the 20x stock tube. If necessary, perform the volume transfer
in two steps. Do not use a 1000 μl capacity pipet and/or wide bore pipet tip.

Preparing 1x coupled beads from 20x stock (includes 20% excess volume)

Table 6. Premixed panel or one singleplex assay.

# of Wells 20x Beads, µl Assay Buffer, µl Total Volume, µl

96 288 5,472 5,760

48 144 2,736 2,880

®

assay buffer to a 15 ml

Table 7. Mixing singleplex assays.

20x Beads, µl 20x Beads, µl
# of Wells Singleplex #1 Singleplex #2 Assay Buffer, µl Total Volume, µl

96

48

288 288 5,184 5,760

144 144 2,592 2,880

16

7. Run Assay

The following instructions apply to premixed multiplex, singleplex, x-Plex™,
and Express assay formats.

Considerations

n

Bring all assay components and samples to room temperature before use

n

Use calibrated pipets and pipet carefully, avoiding bubbles

n

Pay close attention to vortexing, shaking, and incubation instructions.

Deviation from the protocol may result in low assay signal and
assay variability

n

Assay incubations are carried out in the dark. Cover the plate with

aluminum foil or otherwise protect from extended exposure to light

Table 8. Summary of wash steps and incubations. After each assay step, select the
appropriate Bio-Plex Pro
as summarized below.

Bio-Plex Pro or Bio-Plex Pro II Handheld Magnet or
Pro II Wash Station Wash Station Vacuum Manifold

Assay Step Magnetic Program Vacuum Program Manual Wash Steps

Add beads to plate MAG x2 VAC x2 2 x 100 μl

Sample incubation
Detection Ab incubation MAG x3 VAC x3 3 x 100 μl
SA-PE incubation

™

wash station program or perform the appropriate manual wash step

Using a Vacuum Manifold

n

After each incubation, place the filter plate on a calibrated vacuum

apparatus and remove the liquid by vacuum filtration

n

To wash, add 100 μl wash buffer to each well and remove the liquid as

before. Ensure that all wells are exposed to the vacuum

n

Thoroughly blot the bottom of the filter plate with a clean paper towel

between each vacuum step to prevent cross contamination

17

n

Place the assay plate on the plastic plate holder/tray as needed

n

Before each incubation, gently cover the plate with a new sheet of

sealing tape. Avoid pressing down over the wells to prevent leaking
from the bottom

Add Coupled Beads, Samples, Standards, Blank,
and Controls

1. Cover unused wells of the assay plate with sealing tape.

2. Prewet the filter plate. Skip this step if using a flat bottom plate.

a) Prewet the wells with 100 µl assay buffer and remove the liquid

by vacuum filtration. Dry the bottom of the filter plate thoroughly
by blotting on a clean paper towel.

3. Vortex the diluted (1x) beads for 30 sec at medium speed. Pour into

a reagent reservoir and transfer 50 µl to each well of the assay plate.

TIP: A multichannel pipet is highly recommended for ease of use

and efficiency.

4. Wash the plate two times with 100 µl Bio-Plex wash buffer

according to your wash method of choice.

5. Vortex the diluted samples, standards, blank, and controls for 5 sec.

Transfer 50 µl of each to the appropriate well of the assay plate,
changing the pipet tip after every volume transfer.

6. Cover with a new sheet of sealing tape and incubate in the dark for

1 hr at room temperature with shaking at 850 ± 50 rpm.

Note! Vigorous shaking is important for optimal assay signal and

assay precision.

Prepare and Add Detection Antibodies

1. While the samples are incubating use Tables 9 and 10 or the

Calculation Worksheet on page 35 to calculate the volume of
detection antibodies and Bio-Plex detection antibody diluent needed.
Detection antibodies should be prepared 10 min before use.

18

2. Add the required volume of Bio-Plex detection antibody diluent to a

15 ml polypropylene tube.

3. Vortex the 20x stock of detection antibodies for 15–20 sec at

medium speed, then perform a 30 sec spin to collect the entire
volume at the bottom of the tube.

4. Dilute detection antibodies to 1x by pipetting the required volume into

the 15 ml tube. Vortex.

Each well of the assay requires 1.25 μl of the 20x stock adjusted to a

final volume of 25 μl in detection antibody diluent.

Preparing 1x detection antibodies from 20x stock (includes 20% excess volume)

Table 9. Premixed panel or one singleplex assay.

20x Detection Detection Antibody
# of Wells Antibodies, µl Diluent, µl Total Volume, µl

96 145 2,755 2,900

48 73 1,377 1,450

Table 10. Mixing singleplex assays.

20x Detection 20x Detection Detection
Antibodies, µl Antibodies, µl Antibody
# of Wells Singleplex #1 Singleplex #2 Diluent, µl Total Volume, µl

96

48

145 145 2,610 2,900

73 73 1,304 1,450

5. After incubating the beads, samples, standards, blank, and controls,

slowly remove and discard the sealing tape.

6. Wash the plate three times with 100 µl wash buffer according to the

wash method of choice.

7. Vortex the diluted (1x) detection antibodies gently for 5 sec. Pour into

a reagent reservoir and transfer 25 µl to each well of the assay plate
using a multichannel pipet.

8. Cover with a new sheet of sealing tape and incubate in the dark for

30 min at room temperature with shaking at 850 ± 50 rpm.

19

Prepare and Add Streptavidin-PE (SA-PE)

1. While detection antibodies are incubating, use Table 11 or the Calculation

Worksheet on page 35 to calculate the volume of SA-PE and assay
buffer needed. SA-PE should be prepared 10 min before use.

2. Add the required volume of assay buffer to a 15 ml polypropylene tube.

3. Vortex the 100x stock of SA-PE for 5 sec at medium speed. Perform

a 30 sec spin to collect the entire volume at the bottom of the vial.

4. Dilute SA-PE to 1x by pipetting the required volume into the 15 ml

tube. Vortex and protect from light until ready to use.

Each well of the assay requires 0.5 μl of the 100x stock adjusted to a

final volume of 50 μl in assay buffer.

Table 11. Preparing 1x SA-PE from 100x stock (includes 25% excess volume).

# of Wells 100x SA-PE, µl Assay Buffer, µl Total Volume, µl

96 60 5,940 6,000

48 30 2,970 3,000

5. After detection antibody incubation, slowly remove and discard

the sealing tape.

6. Wash the plate three times with 100 µl of wash buffer according

to the wash method of choice.

7. Vortex the diluted (1x) SA-PE at medium speed for 5 sec. Pour

into a reagent reservoir and transfer 50 µl to each well using a
multichannel pipet.

8. Cover with a new sheet of sealing tape and incubate in the dark for

10 min at room temperature with shaking at 850 ± 50 rpm.

9. After the streptavidin-PE incubation step, slowly remove and discard

the sealing tape.

20

10. Wash the plate three times with 100 µl of wash buffer according

to the wash method of choice.

11. To resuspend beads for plate reading, add 125 µl assay buffer to

each well. Cover the plate with a new sheet of sealing tape. Shake
at room temperature at 850 ± 50 rpm for 30 sec and slowly remove
the sealing tape. Ensure that the plate cover has been removed
before placing the plate on the reader.

Table 12. Read the plate using the appropriate instrument settings.

Instrument RP1 (PMT) DD Gates Bead Events

Bio-Plex 100, 200* Low 5,000 (low), 25,000 (high) 50

Bio-Plex 3D* Standard Select MagPlex beads 50

®

Bio-Plex

* Or similar Luminex-based system.

MAGPIX™ N/A, use default instrument settings

8. Read Plate

Bio-Plex Manager™ software is recommended for all Bio-Plex Pro™ assay
data acquisition and analysis. Instructions for Luminex xPONENT software
are also included. For instructions using other xMAP system software
packages, contact Bio-Rad Technical Support or your regional Bio-Rad
field applications specialist.

Prepare Protocol in Bio-Plex Manager Software
Version 6.0 and Higher

The protocol should be prepared in advance so that the plate is read as
soon as the experiment is complete.

A protocol file specifies the analytes in the assay, the plate wells to be
read, sample information, the values of standards and controls, and
instrument settings.

21

Bio-Plex Manager software versions 6.0 and higher contain protocols for
most Bio-Plex

®

assays. Choose from available protocols or create a new
protocol. To create a new protocol, select File, then New from the main
menu. Locate and follow the steps under Protocol Settings.

1. Describe Protocol and enter information about the assay (optional).

2. Select Analytes and create a new panel. Visually confirm the selected

analytes and proceed to step 3.

a. Click the Add Panel button

in the Select Analytes toolbar.
Enter a new panel name. Select Bio-Plex Pro Assay Magnetic
from the assay dropdown list. If using Bio-Plex Manager version

5.0 or lower, select MagPlex from the assay dropdown list.

b. Click the Add button. Enter the bead region number and name
for the first analyte. Click Add Continue to repeat for each analyte
in the assay. Refer to the bead regions in parentheses ( ) listed on
the peel-off label provided with the standards.

For reference, bead regions for human cancer assays are shown

in Table 13.

c. Click the Add button when the last analyte has been added and
click OK to save the new panel.

d. Highlight analytes from the Available list (left) and move to the
Selected list (right) using the Add button. To move all analytes at
once, simply click the Add All button.

e. If some of the analytes need to be removed from the Selected
list, highlight them and select Remove. If desired, it is possible to
rename the panel by clicking on Rename Panel and entering a
new panel name.

22

Table 13. Bead regions for human cancer biomarker panels.

Panel 1

Analyte Bead Region Analyte Bead Region Analyte Bead Region

sEGFR 15 sIL-6Ra 19 Prolactin 52
FGF-basic 44 Leptin 78 SCF 65
Follistatin 26 Osteopontin 77 TIE-2 64
G-CSF 57 PDGF-AB/BB 47 sVEGFR-1 76
sHER2/neu 12 PECAM-1 46 sVEGFR-2 45
HGF 62

Panel 2

Angiopoietin-2 47 IGFBP-1 62 TGF-a 76
sCD40L 29 IL-6 19 TNF-a 36
EGF 14 IL-8 54 uPA 78
Endoglin 26 IL-18 42 VEGF-A 45
sFASL 35 PAI-1 61 VEGF-C 64
HB-EGF 57 PLGF 52 VEGF-D 43

3. Format the plate in Bio-Plex Manager according to the plate layout

created in section 1 (Plan Plate Layout). To modify the plate layout,
follow the steps below (see Figure 4).

a. Select the Plate Formatting tab.

b. Select the standards icon

S

and drag the cursor over all
the wells that contain standards. Repeat this process for
Blanks

B

, Controls C, and Samples X. Note that
Bio-Plex Manager automatically subtracts the blank FI
value from all other assay wells.

23

Fig. 4. Plate formatting.

4. Enter Standards Info into Bio-Plex Manager.

a. Enter the highest concentration of each analyte in the top row
(labeled S1) of the table. S1 concentration information is included
with each vial of standards.

b. Enter a dilution factor of 4 and click Calculate. The concentrations

for each standard point will be populated for all analytes in the table.

c. Optional: enter the lot number of the vial of standards into the
Standard Lot box and click Save.

24

5. Enter Controls Info into Bio-Plex Manager.

a. For user-specified controls, select an analyte from the dropdown

menu, then enter a description and concentration. Repeat for
each additional analyte in the assay.

b. For the quality controls supplied in premixed cancer

biomarker kits, format the appropriate wells as controls, enter
descriptions, but leave the concentrations blank. Alternatively,
the quality controls can be formatted as samples with clear
descriptions such as “quality control high” and “quality control
low.” In any case, the expected control ranges provided on the

product data sheet are not entered into Bio-Plex Manager
software version 6.1 and earlier.

6. Enter Sample Info — enter sample information and the appropriate
dilution factor.

7. Run Protocol — confirm that the assay settings are correct.

a. Human cancer biomarker assays are run at the default setting in

Bio-Plex Manager: low RP1 target (low PMT).

b. Confirm that data acquisition is set to 50 beads per region.

In Advanced Settings, confirm that the bead map is set to
100 region, the sample size is set to 50 µl, and the doublet
discriminator (DD) gates are set to 5,000 (Low) and 25,000 (High).
In Bio-Plex Manager software versions 4.0, 4.1, 4.1.1, and 5.0,
check Override Gates and set the DD gate values as indicated.

Select Start, name and save the .rbx file, and begin data
acquisition. The Run Protocol pop-up screen will appear.
Click Eject/Retract to eject the plate carrier.

25

Acquire Data

1. Shake the assay plate at 850 ± 50 rpm for 30 sec, and visually
inspect the plate to ensure that the assay wells are filled with buffer.
Slowly remove the sealing tape and any plate cover before placing
the plate on the plate carrier.

2. Run Protocol – on the pop-up screen, select Load Plate and click OK

to start acquiring data.

3. Use the Wash Between Plates
to reduce the possibility of clogging the instrument.

4. If acquiring data from more than one plate, empty the waste bottle
and refill the sheath bottle after each plate (if HTF are not present).
Select Wash Between Plates and follow the instructions. Then repeat
the Prepare Protocol and Acquire Data instructions.

5. When data acquisition is complete, select Shut Down
follow the instructions.

command after every plate run

and

Reacquire Data

It is possible to acquire data from a well or plate a second time using the
Rerun/Recovery mode located below Start in the Run Protocol step.
Any previous data will be overwritten.

1. Check the wells from which data will be reacquired.

2. Aspirate the buffer with the wash method of choice, but do not
perform wash step.

3. Add 100 µl of assay buffer to each well. Cover the plate with a new

sheet of sealing tape.

4. Repeat the Acquire Data steps to reacquire data. The data acquired

should be similar to those acquired initially; however, the acquisition
time will be extended because the wells have fewer beads.

26

Data Analysis

Quality Controls

If the quality controls were run in the assay plate, open the results (.rbx) file,
click on Report Table, and locate the control wells. Visually compare the
observed concentrations of the high and low controls in the Report Table
against the lot-specific control ranges shown in the product data sheet.

Note! Expected control ranges are provided for reference and should be
used as general guidelines. Actual results may vary for some operators.
If the controls do not fall within the expected ranges, please refer to the
troubleshooting section for possible causes and solutions.

Removing Outliers

Outliers are identified as standard data points that do not meet accuracy
or precision requirements and should be considered invalid when
performing curve fitting. As such, they should be removed to generate a
more realistic and accurate standard curve. This may result in an extended
assay working range and allow quantitation of samples that might
otherwise be considered out of range.

In Bio-Plex Manager software version 6.0 and higher, outliers can be
automatically removed by selecting the Optimize button in the Standard
Curve window. In Bio-Plex Manager software 6.0 and earlier versions,
outliers also can be manually selected in the Report Table. Visit online Help
to learn more about the standard curve optimizer feature and how outliers
are determined.

Previous Versions of Bio-Plex Manager Software

For instructions on using previous versions of Bio-Plex Manager software,
please contact Bio-Rad Technical Service.

27

Luminex xPONENT Software

Luminex xPONENT software may be used to analyze Bio-Plex assays.
Although guidelines are provided here, consult the xPONENT software
manual for more details. Perform a system initialization with Luminex’s
calibration and performance verification kit, as directed by Luminex.
Select Batches to set up the protocol and follow the information
under Settings.

Note! The instrument settings described below apply to Luminex 100/200
and FLEXMAP 3D instruments. For the Bio-Plex MAGPIX reader, use the
default instrument settings.

1. Select MagPlex as the bead type for magnetic beads. This

automatically sets the DD gates.

2. Volume = 50 µl.

3. Bio-Plex Pro human cancer assays are run at low PMT

(Standard PMT).

4. Plate name: 96-well plate.

5. Analysis type: Quantitative, 5PL Curve Fit.

6. Number of standards: 8.

Select Analytes to set up the panel.

1. Enter “pg/ml” in the Units field.

2. Enter 50 in the Count field.

3. Select the bead region and enter the analyte name.

4. Click “Apply all” for Units and Count.

Select Stds and Ctrls.

1. Enter standard concentrations, lot number, dilution factor, and other

information as applicable.

After the assay is complete, select Results, then select Saved Batches.

28

Troubleshooting Guide

This troubleshooting guide addresses problems that may be encountered
with Bio-Plex Pro

™

assays. If you experience any of the problems listed
below, review the possible causes and solutions provided. Poor assay
performance may also be due to the Bio-Plex

®

suspension array reader.
To eliminate this possibility, use the validation kit to assist in determining if
the array reader is functioning properly.

Possible Causes

High Inter-Assay CV

Standards and controls were not
reconstituted consistently between
assays

Possible Solutions

Incubate the reconstituted
standards for 30 min on ice. Always
be consistent with the incubation
time and temperature.

Reconstituted standards, controls,
and diluted samples were not
stored properly

Reconstituted standards and diluted
samples should be prepared on ice
as instructed. Prior to plating, the
reconstituted standards and diluted
samples should be equilibrated to
room temperature.

Bottom of filter plate not dry

Dry the bottom of the filter plate with
absorbent paper towel (preferably
lint-free) to prevent cross-well
contamination.

29

Possible Causes

High Intra-Assay CV

Improper pipetting technique

Possible Solutions

Pipet carefully when adding
standards, controls, samples,
detection antibodies, and
streptavidin-PE, especially when
using a multichannel pipet. Use a
calibrated pipet. Change pipet tip
after every volume transfer.

Reagents and assay components
not equilibrated to room
temperature prior to pipetting

Contamination with wash buffer
during wash steps

Slow pipetting of samples and
reagents across the plate

All reagents and assay components
should be equilibrated to room
temperature prior to pipetting.

During the wash steps, be careful
not to splash wash buffer from one
well to another. Be sure that the
wells are filtered completely and that
no residual volume remains. Ensure
that the microplate shaker setting is
not too high. Reduce the microplate
shaker speed to minimize splashing

Sample pipetting across the entire
plate should take less than 4 min.
Reagent pipetting across the entire
plate should take less than 1 min.

30

Possible Causes

Low Bead Count

Miscalculation of bead dilution

Possible Solutions

Check your calculations and be
careful to add the correct volumes.

Beads clumped in multiplex
bead stock tube

Vacuum on for too long when
aspirating buffer from wells

Assay plate not shaken enough
during incubation steps and prior
to reading

Reader is clogged

Incorrect needle height of the
reader

Low Signal or Poor Sensitivity

Standards reconstituted incorrectly

Vortex for 30 sec at medium speed
before aliquoting beads.

Do not apply vacuum to the filter
plate for longer than 10 sec after the
buffer is completely drained from
each well.

Shake the plate at 850 ± 50 rpm
during incubation steps and for
30 sec immediately before reading
the plate.

Refer to the troubleshooting guide
in the Bio-Plex system hardware
instruction manual (bulletin
#10005042).

Adjust the needle height to coincide
with the plate type provided in the kit.

Follow the cytokine standard
instructions carefully.

Detection antibody or
streptavidin-PE diluted incorrectly

31

Check your calculations and be
careful to add the correct volumes.

Possible Causes

High Background Signal

Incorrect buffer was used
(for example, assay buffer used
to dilute standards)

Possible Solutions

Use sample matrix standard diluent
to dilute standards.

Accidentally spiked blank wells

Detection antibodies or
streptavidin-PE incubated too long

Poor Recovery

Expired Bio-Plex reagents
were used

Incorrect amounts of components
were added

Microplate shaker set to an
incorrect speed

High end saturation of the
standard curve

Quality controls do not fall within
expected ranges.

Be careful when spiking standards.
Do not add any antigens to the
blank wells.

Follow the procedure incubation
time precisely.

Check that reagents have not expired.
Use new or nonexpired components.

Check your calculations and be
careful to add the correct volumes.

Check the microplate shaker speed
and use the recommended setting.
Setting the speed too high may
cause splashing and contamination.
Use the recommended plate shaker.

Make sure that correct shaker speed
and incubation times are used.
Remove S1 for data analysis if needed.

Make sure that the controls are
reconstituted at the same time as
standards and in the same diuent
(standard diluent HB). Incubate for
precisely 30 min.

32

Possible Causes

Poor Recovery

Improper pipetting
technique

Impact of Sample Matrix

Negative MFI values in
samples or standards

Possible Solutions

Pipet carefully when adding standards, samples,
detection antibodies, and streptavidin-PE, especially
when using a multichannel pipet. Use a calibrated
pipet. Change pipet tip after every volume transfer.

If samples contain little or no analyte, negative
values observed may be due to statistical variation.
If assay drift is suspected, retest the samples
by positioning them next to the standards. If
contamination of standards is suspected, check
the standard replicate value and be careful when
adding samples to the wells. Matrix effects could
also produce negative sample values.

Bio-Plex Manager
subtracts the Blank (B) FI value from all other
assay wells. While this has no impact on observed
concentrations of samples within the assay
working range, it may result in a negative FI value
if the Blank’s FI value is greater than either the
standard or the sample value. If this is undesirable,
then reformat the blank wells as Sample (X) or
Control (C) in the protocol or results file.

Poor precision in
serum and
plasma sample
measurements

Check if any interfering components such as
heparin-based anticoagulant, additives, or
gel from separators were introduced into the
samples. Avoid using hemolyzed and heavily
lipemic samples. Remove visible particulate in
samples by centrifugation. Avoid multiple freeze­thaw cycles of samples.

33

™

software automatically

Plate Layout Template

34

Calculation Worksheet

If using either a premixed panel or one singleplex assay, follow these directions.

Plan the plate layout and enter the number of wells to be used in the assay:_______

1

1. Determine the volume of 1x coupled beads needed.

a. Each well requires 50 µl of coupled beads (1x): _______ x 50 µl = _______ µl

b. Include 20% excess to ensure enough volume: _______ µl x 0.20 = _______ µl

c. Total volume of 1x coupled beads: _______ µl + _______ µl = _______ µl

d. Volume of 20x coupled beads required: _______ µl/20 = _______ µl

e. Volume of assay buffer required: _______ µl – _______ µl = _______ µl

2 3 4

4 5 6

2. Determine the volume of 1x detection antibody needed.

a. Each well requires 25 µl detection antibodies (1x): ______ x 25 µl = _______ µl

b. Include 20% excess to ensure enough volume: _______ µl x 0.2 = _______ µl

c. Total volume of 1x detection antibodies: _______ µl + _______ µl = _______ µl

d. Volume of 20x detection antibodies required: _______ µl/20 = _______ µl

e. Volume of detection antibody diluent required: _____ µl – _____ µl = _____ µl

3. Determine the volume of 1x streptavidin-PE needed.

a. Each well requires 50 µl streptavidin-PE (1x): _______ x 50 µl = _______ µl

b. Include 25% excess to ensure enough volume: _______ µl x 0.25 = _______ µl

c. Total volume of 1x streptavidin-PE: ______ µl + ______ µl = ______ µl

d. Volume of 100x streptavidin-PE required: _______ µl/100 = _______ µl

e. Volume of assay buffer required: _______ µl – _______ µl = _______ µl

10 11 12

12 13 14

1 2

2 3

4 5

1 7

7 8

7 8 9

9 10

9 10 11

1 10

10 11

12 13

35

If mixing singleplex assays, follow these directions.

Enter the number of wells to be used in the assay:_______

1

1. Determine the volume of 1x coupled beads needed.

a. Each well requires 50 µl coupled beads (1x): _______ x 50 µl = _______ µl

b. Include 20% excess to ensure enough volume: _______ µl x 0.20 = _______ µl

c. Total volume of 1x coupled beads: _______ µl + _______ µl = _______ µl

d. Enter the number of singleplex sets (or analytes) that will be multiplexed: _______

2 3 4

1 2

2 3

5

e. Volume of 20x coupled beads required from each stock tube:
_______ µl/20 = _______ µl

4 6

f. Total volume of combined bead stocks: _______ x _______ µl = _______ µl

g. Volume of assay buffer required: _______ µl – _______ µl = _______ µl

5 6 7

4 7 8

2. Determine the volume of 1x detection antibody needed.

a. Each well requires 25 µl detection antibodies (1x): _______ x 25 µl = _______ µl

b. Include 20% excess to ensure enough volume: _______ µl x 0.2 = _______ µl

c. Total volume of 1x detection antibodies: _______ µl + _______ µl = _______ µl

d. Enter the number of singleplex sets (or analytes) that will be multiplexed: _______

9 10 11

1 9

9 10

5

e. Volume of 20x detection antibodies required from each stock tube:
_______ µl/20 = _______ µl

11 12

f. Total volume of combined detection antibody stock: _____ µl x _____ = _____ µl

g. Volume of detection antibody diluent required: ____ µl – ____ µl = ____µl

12 5 13

11 13 14

3. Determine the volume of 1x streptavidin-PE needed.

a. Each well requires 50 µl streptavidin-PE (1x): _______ x 50 µl = _______ µl

b. Include 25% excess to ensure enough volume: _______ µl x 0.25 = _______ µl

c. Total volume of 1x streptavidin-PE: ______ µl + ______ µl = _______ µl

d. Volume of 100x streptavidin-PE required: _______ µl/100 = _______ µl

e. Volume of assay buffer required: _______ µl – _______ µl = _______ µl

15 16 17

17 18 19

1 15

15 16

17 18

36

Safety Considerations

Eye protection and gloves are recommended when using these products.
Consult the MSDS for additional information. The Bio-Plex Pro
contain components of animal origin. This material should be handled as
if capable of transmitting infectious agents. Use universal precautions.
These components should be handled at Biosafety Level 2 containment
as defined by U.S. government publication, Biosafety in Microbiological
and Biomedical Laboratories (Centers for Disease Control, 1999).

™

assays

Legal Notices

Acrodisc and Supor are trademarks of Pall Corporation. MAGPIX, MagPlex,
xMAP, xPONENT, and Luminex are trademarks of Luminex Corporation.

The Bio-Plex
microspheres and instrumentation licensed to Bio-Rad Laboratories, Inc.
by the Luminex Corporation.

®

suspension array system includes fluorescently labeled

37

Ordering Information

Detailed ordering information can be found at www.bio-rad.com/bio-plex.

Catalog # Premixed Multiplex Assay Panels

171-AC500M Bio-Plex Pro Human Cancer Biomarker Panel 1, 16-plex, 1 x 96-well
171-AC600M Bio-Plex Pro Human Cancer Biomarker Panel 2, 18-plex, 1 x 96-well

Components and Accessories

Various Bio-Plex Pro Human Cancer Biomarker Panel 1 Singleplex Sets, 1 x 96-well

Various Bio-Plex Pro Human Cancer Biomarker Panel 2 Singleplex Sets, 1 x 96-well

Individual Components and Accessories

171-304055 Bio-Plex Pro Reagent Kit II, 1 x 96-well Filter Plate
171-304055M Bio-Plex Pro Reagent Kit II, 1 x 96-well Flat Bottom Plate
171-DC5000 Bio-Plex Pro Human Cancer Biomarker Panel 1, 16-plex Standards, pkg of 1 vial
171-DC5001 Bio-Plex Pro Human Cancer Biomarker Panel 1, 16-plex Standards, pkg of 50 vials
171DC6000 Bio-Plex Pro Human Cancer Biomarker Panel 2, 18-plex Standards, pkg of 1 vial
171DC6001 Bio-Plex Pro Human Cancer Biomarker Panel 2, 18-plex Standards, pkg of 50 vials
171-304502 Filter Plate, 1 x 96-well with clear plastic lid and tray

Bio-Plex

Premium custom assay service using the Bio-Plex Assay Builder
(www.bio-rad.com/bio-plex/assaybuilder) to select analytes and plate type
of interest. Assays are supplied as premixed coupled beads and detection
antibodies in the all-in-one kit format. Quality controls are included.

Bio-Plex Express Assays (You Mix)

Fast and economical custom assay service using the Bio-Plex Assay Builder
(www.bio-rad.com/bio-plex/assaybuilder) to select analytes and plate
type of interest. Assays are supplied as individual sets of coupled beads and
detection antibodies in the all-in-one kit format. Quality controls not included.

(requires reagent kit II and standards)

(requires reagent kit II and standards)

®

x-Plex™ Assays (We Mix)

Other Components and Accessories

Wash buffer, Bio-Plex Pro flat bottom plates, and streptavidin-PE are also
available individually. For more information, go to www.bio-rad.com/bio-plex.

38

39

Bio-Rad
Laboratories, Inc.

Life Science
Group

Web site ww w.bio-rad.com USA 80 0 424 6723
Australia 61 2 9914 2800 Austria 01 877 89 01 Belgium 09 385 55 11
Brazi l 55 11 5044 5699 Canada 905 364 3 435 China 86 21 6169 8500
Czech R epublic 420 241 430 532 Denmark 44 52 10 00
Finland 09 804 22 00 France 01 47 95 69 65 Ger many 089 31 884 0
Greece 30 210 9532 220 Hon g Kong 852 2789 330 0
Hungary 36 1 459 6100 India 91 124 4029300 Israel 03 963 6050
Italy 39 02 216091 Japan 03 6361 7000 Korea 82 2 3473 4460
Mexico 52 5 55 488 7670 The Netherlands 0318 540666
New Zealand 64 9 415 2280 No rway 23 38 41 30
Poland 48 22 331 99 99 Portugal 351 21 472 7700
Russia 7 495 721 14 04 Singapore 65 6415 3188
South Africa 27 861 246 723 Spain 3 4 91 590 5200
Sweden 08 555 1270 0 Switzerland 061 717 95 55
Taiwan 886 2 2578 7189 Thailand 800 88 22 88
United Kingdom 020 8328 200 0

Sig 121110022186 Rev B