User Manual - YSL Bioprocess Development Co.

User Manual
Non-Magnetic Beads
PN: UM-P20121001
For research use only. Not for use in diagnostic procedures.
Rev 1.
1
AimPlex™ assay kits and any related reagents and documentation are provided “as is” without warranty
of any kind. Although we have tried our best to ensure accuracy of this user manual and any related
documentation, YSL Bioprocess Development Co. does not warrant, guarantee, or make any
representations regarding the use or the results of the use of AimPlex assay kits and related
documentation in terms of correctness, accuracy, reliability, or omissions. The entire risk as to the use,
results, and performance of AimPlex assay kits and related documentation is assumed by the user. YSL
Bioprocess Development Co. assumes no liability of any kind, whether oral or written, expressed or
implied, for any direct, indirect, special, incidental, or consequential damages resulting from any defects
in its documentation. This user manual and related documentation are subject to change without notice.
AimPlex is a trademark licensed to YSL Bioprocess Development Co.
All other trademarks appearing in this user manual are owned by their respective owners.
Please contact Customer Service at contact@yslbio.com with any questions or comments.
© Copyright 2012 YSL Bioprocess Development Co. All rights reserved.
Rev 1.
2
Contents
1
How It Works ........................................................................................................................................ 5
2
Available AimPlex Immunoassay Kit format ......................................................................................... 6
3
2.1
Single Plex Kits .............................................................................................................................. 6
2.2
Premixed Multiplex Kits ................................................................................................................ 6
2.3
Custom panels and assay development and custom bulk packaging........................................... 6
Supplied reagents and materials .......................................................................................................... 6
3.1
Single Plex Kits .............................................................................................................................. 6
3.1.1
Analyte Kit ............................................................................................................................. 6
3.1.2
Basic Kit ................................................................................................................................. 7
3.2
Premixed Multiplex Kits ................................................................................................................ 8
3.2.1
Premixed Analyte Kit............................................................................................................. 8
3.2.2
Basic Kit for Premixed Panels................................................................................................ 8
3.3
Diluent Kits.................................................................................................................................... 8
3.3.1
CCS (Cell culture supernatant) Diluent kit ............................................................................ 8
3.3.2
NR (Non-Rodent) SPB (Serum/Plasma/Bodily Fluid) Diluent kit ........................................... 9
3.3.3
Mouse/Rat SPB (Serum/Plasma/Bodily Fluid) Diluent kit..................................................... 9
3.3.4
TL (Tissue/cell lysate) Diluent kit .......................................................................................... 9
4
Required Equipment Not Supplied ....................................................................................................... 9
5
Preparing 1x Reading Buffer and 1x Wash Buffer...............................................................................10
6
7
8
5.1
1x Reading Buffer........................................................................................................................10
5.2
1x Wash Buffer............................................................................................................................10
Preparing Antibody-Coupled Bead Working Suspension.................................................................... 10
6.1
Single Plex Kits ............................................................................................................................10
6.2
Premixed Multiplex Kits .............................................................................................................. 11
Preparing Biotinylated Detection (dAb) Antibody Working Solution .................................................11
7.1
Single Plex Kits ............................................................................................................................11
7.2
Premixed Multiplex Kits .............................................................................................................. 12
Preparing Antigen Standards .............................................................................................................. 12
Rev 1.
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8.1
8.1.1
If there is only one standard vial in the kit ......................................................................... 12
8.1.2
If there are multiple standard vials in the kit...................................................................... 12
8.2
9
Reconstitution of the lyophilized standards ...............................................................................12
Serial dilution preparation .......................................................................................................... 13
Performing the assay ..........................................................................................................................13
10
Setting Up Flow cytometers............................................................................................................ 15
10.1
Fluorescence channels ................................................................................................................15
10.2
Preparing instrument setup beads .............................................................................................15
10.3
Setting up a display layout/template..........................................................................................16
10.4
Running the setup beads ............................................................................................................ 16
11
Analyzing the samples.....................................................................................................................18
12
Technical hints ................................................................................................................................19
13
Troubleshooting..............................................................................................................................20
14
Blank Plate Layout...........................................................................................................................21
Rev 1.
4
1
How It Works
AimPlex multiplex assay technology utilizes multiple bead populations differentiated by size and
different levels of fluorescence intensity. With multiple sizes of beads and multiple levels of
fluorescence intensity in each bead size, the AimPlex technology can measure up to 24 analytes
simultaneously in a single reaction. The bead populations in the reaction are determined by a
flow cytometer equipped with a 488nm laser. The maximum emission of the bead classification
dye is at 700 nm.
Similar to the principle of a sandwich ELISA, each bead population conjugated with a specific
capture antibody to trap the protein of interest, such as a cytokine, in the sample. The amount
of the analyte captured is detected via a biotinylated antibody against a secondary epitope of
the protein, followed by a streptavidin-R-phycoerythrin treatment. The fluorescent intensity of
R-phycoerythrin on the beads is quantified on a flow cytometer. Concentrations of a protein of
interest in the samples can be obtained by comparing the fluorescent signals to those of a
standard curve generated from a serial dilution of a known concentration of the analyte.
The assay procedure consists of a 60 min antigen and capture antibody conjugated bead
incubation step, a 30 min biotinylated detection incubation step and a 20 min streptavidin-PE
incubation step.
Assay Protocol Overview:
Rev 1.
5
2
Available AimPlex Immunoassay Kit format
2.1 Single Plex Kits
All available AimPlex immunoassays are grouped as 12-24 analytes per panel. Each analyte in a panel
has a unique bead region and can be multiplexed together in any combination. Analytes in different
panels may be multiplexed together if there is no conflicted on the bead regions but may have some
cross-reactivity because we did not validate cross-reactivity of all the assays across different panels.
Each Single Plex Kit consists of 1 or more user selectable Analyte Kits, a Basic Kit and a sample matrix
specific Diluent Kit. Each Analyte Kit contains analyte specific Ab conjugated beads, detection
antibody(ies) and corresponding antigen standard(s). The Basic Kit has species-specific detection
antibody diluent, reading buffer, wash buffer, Streptavidin-PE (SAPE), filter plate and plate seals. The
Diluent Kit contains sample-type specific Standard Diluent and sample Assay Buffer.
2.2 Premixed Multiplex Kits
Each Premixed Multiplex Kit has a pre-defined multiplex panel with premixed antibody-conjugated
beads, antigens and detection antibodies. Except the Reading Buffer (10x) and Wash Buffer (10x), all the
reagents are supplied as ready-to-use.
2.3 Custom panels and assay development and custom bulk packaging
We offer custom premixed multiplex panels as well as custom assay development for analytes not
currently available. We will work with you to design the panels and assays. Please contact us for pricing,
lead time and details of those offerings.
We also offer custom bulk packaging, usually in 5 plate size. Please contact us for details.
3
Supplied reagents and materials
3.1 Single Plex Kits
Each Single Plex Kit consists of 1 or more user selectable Analyte Kits, a Basic Kit and a sample matrix
specific Diluent Kit (refer to section 3.3 for available Diluent kits).
3.1.1
Analyte Kit
Each Analyte Kit consists of the following components. If multiple analyte kits are ordered, all the
components are shipped in a single Analyte Kit box.
Rev 1.
6
Component
Vol
45x Analyte-Specific Ab conjugated beads, e.g. 45x S4P7-human IL-2
0.1 mL
(S4 = Size 4µm beads, P7 = Peak 7 of the 4µm beads)
25x Analyte-Specific biotinylated detection Ab, e.g. 25x Biotin-human IL-2
0.1 mL
dAb
Lyophilized Antigen Standard*
1 vial*
* Each vial may contain one or multiple antigens, refer to lot-specific Standard Info Sheet for details.
3.1.2
Basic Kit
There are 2 species-specific, non rodent (NR) and mouse/rat, Basic Kits.
3.1.2.1 NR (Non Rodent) Basic Kit
This Basic Kit is for human, non-human primate and other non-rodent species asssays.
Component
Vol
3x NR Detection Ab Diluent
1x Streptavidin-PE (SAPE)
10x Reading Buffer
10x Wash Buffer
PCR 8-tube Strip
Filter Plate and Lid
Plate Seals
User Manual
Packaging insert
1 mL
3 mL
5 mL
20 mL
2 each
1 each
6 sheets
1 each
1 each
3.1.2.2 Mouse/Rat Basic Kit
This Basic Kit is for mouse and rat assays.
Component
Vol
3x Mouse/Rat Detection Ab Diluent
1x Streptavidin-PE (SAPE)
10x Reading Buffer
10x Wash Buffer
PCR 8-tube Strip
Filter Plate and Lid
Plate Seals
1 mL
3 mL
5 mL
20 mL
2 each
1 each
6 sheets
Rev 1.
7
User Manual
Packaging insert
1 each
1 each
3.2 Premixed Multiplex Kits
Each Premixed Muliplex Kit consists of a Premixed Analyte Kit, a Basic Kit for premixed panels and a
sample matrix specific Diluent Kit (refer to section 3.3 for available Diluent kits).
3.2.1
Premixed Analyte Kit
Component
Vol
1x Premixed Ab-conjugated beads
5 mL
2x Premixed Biotin-dAbs
1.5 mL
2x NR or Mouse/Rat dAb Diluent (depending on the assay panel)
1.5 mL
Lyophilized Antigen Standards*
1 or multiple vials
* Antigen standards are supplied as premixed but can be in a single vial or multiple vials depending on
the panels. Refer to Standard Info Sheet for details.
3.2.2
Basic Kit for Premixed Panels
Component
Vol
1x Streptavidin-PE (SAPE)
10x Reading Buffer
10x Wash Buffer
PCR 8-tube Strip
Filter Plate and Lid
Plate Seals
User Manual
Packaging insert
3 mL
5 mL
20 mL
2 each
1 each
6 sheets
1 each
1 each
3.3 Diluent Kits
The Diluent Kits are sample type-specific. Please indicate the sample type of your assay panel when
place an order.
3.3.1
CCS (Cell culture supernatant) Diluent kit
This kit is for cell culture supernatant samples. It is universal for all species.
Rev 1.
8
Component
CCS Standard Diluent
CCS Assay Buffer
3.3.2
Vol
2.5 mL
8 mL
NR (Non-Rodent) SPB (Serum/Plasma/Bodily Fluid) Diluent kit
This kit is for serum, plasma and bodily fluid (SPB) samples from human, non-human primate and other
non-rodent (NR) species.
Component
NR SPB Standard Diluent
NR SPB Assay Buffer
3.3.3
Vol
2.5 mL
8 mL
Mouse/Rat SPB (Serum/Plasma/Bodily Fluid) Diluent kit
This kit is for mouse and rat serum, plasma and bodily fluid samples.
Component
Mouse/Rat SPB Standard Diluent
Mouse/Rat SPB Assay Buffer
3.3.4
Vol
2.5 mL
8 mL
TL (Tissue/cell lysate) Diluent kit
This kit is for tissue and cell lysate samples. It is universal for all species.
Component
TL Standard Diluent
TL Assay Buffer
4
Vol
2.5 mL
8 mL
Required Equipment Not Supplied



Rev 1.
Barnstead/Lab-Line Titer Plate Shaker (Thermo Scientific, Waltham, MA) or equivalent.
The shaker should have 3 mm orbit with ability to maintain 600-800 rpm.
Multiscreen vacuum manifold (Millipore, Billerica, MA) with vacuum source
A flow cytometer equipped with a 488nm laser and capable of detecting FS, SS, PE and
PECy5 (and/or PECy7).
9
5 Preparing 1x Reading Buffer and 1x Wash Buffer
5.1 1x Reading Buffer
Bring the 10x Reading Buffer to room temperature and vortex for 15 seconds. Mix 5 mL of the 10x
Reading Buffer with 45 mL ddH20. The 1x Reading Buffer can be stored at 2-8 °C for up to 3 months.
5.2 1x Wash Buffer
Bring the 10x Wash Buffer to room temperature and vortex for 15 seconds. Mix 20 mL of the 10x Wash
Buffer with 180 mL ddH20. The 1x wash Buffer can be stored at room temperature for up to 3 months.
6 Preparing Antibody-Coupled Bead Working Suspension
6.1 Single Plex Kits
The capture bead stock provided with each kit is a 45x concentrated stock (1 µL per test). Dilution of the
stock beads to working suspension with 1x Reading Buffer is needed.
6.1.1. Determine the number of analytes in the panel (e.g. a 7-plex panel)
6.1.2. Determine the number of wells in the experiment. We recommend adding an additional
at least 2 wells to account for pipetting recovery. For example, if a total of 48 wells is
needed in the experiment, prepare enough for 50 wells.
6.1.3. Determine the total volume of working bead suspension needed for the experiment. Each
tube/well needs 45 µL of the working bead suspension. The total volume is calculated by
multiplying the number of wells (calculated in Step 6.1.2.) by 45 µL. For example, 50 wells
× 45 µL = 2,250 µL total working bead suspension.
6.1.4. Determine the volume needed for each 45x Analyte-Specific Ab Conjugated Beads (i.e. 1.0
µL needed for each well). Therefore, for example, a total of 50 wells needs 50 µL of each
45x capture bead stock.
6.1.5. Determine the volume of 1x Reading Buffer needed to prepare the working bead
suspension. Calculate the 1x Reading Buffer volume by subtracting the volume for each
capture bead stock:
____ µL from Step 6.1.3 – ___ µL from Step 6.1.4 x ___ number of Plex (Step 6.1.1) =
____ µL of 1x Reading Buffer
For example, a 7-plex panel for 50 wells: 2,250 - 50 x 7 = 1900 µL of 1x Reading Buffer
Rev 1.
10
6.1.6. Add the appropriate volume (determined in Step 6.1.5) of 1x Reading Buffer to a test tube
labeled with "Working Bead Suspension".
6.1.7. Centrifuge each capture bead vial at 20,00 x g for 10 sec.
6.1.8. Vortex each capture bead vial for 15 second.
6.1.9. Add the appropriate volume (determined in Step 6.1.4.) of each capture bead stock into
the "Working Bead Suspension" tube.
6.1.10.Mix by gentle vortexing. If not use immediately, store the working bead suspension at 28oC with light protection. It can be stored at 2-8 °C for up to 1 week.
6.2 Premixed Multiplex Kits
The antibody-coupled beads are provided as premixed ready-to-use 1x suspension. No preparation is
needed.
7 Preparing Biotinylated Detection (dAb) Antibody Working Solution
7.1 Single Plex Kits
The Biotinylated Detection (dAb) Antibody stock provided with each kit is a 25x concentrated stock (1 µL
per test). Dilution of the stock biotinylated dAb stocks to working solution with NR or Mouse/Rat dAb
Diluent is needed.
7.1.1. Determine the number of analytes in the panel (e.g. a 7-plex panel)
7.1.2. Determine the number of wells in the experiment. We recommend adding an additional 2
wells to account for pipetting recovery. For example, if a total of 48 wells is needed in the
experiment, prepare enough for 50 wells.
7.1.3. Determine the total volume of working dAb solution needed for the experiment. Each
tube/well needs 25 µL of the working detection antibody solution. The total volume is
calculated by multiplying the number of wells (calculated in Step 7.1.2.) by 25 µL. For
example, 50 wells × 25 µL = 1,250 µL total working detection antibody solution.
7.1.4. Determine the volume needed for each 25x Biotinylated Detection Antibody stock (i.e. 1.0
µL needed for each well). Therefore, for example, a total of 50 wells needs 50 µL of each
25x detection antibody stock.
7.1.5. Determine the volume of 3x NR or Mouse/Rat dAb Diluent needed to prepare the working
dAb solution.
____ µL from Step 7.1.3 ÷ 3 = ____ µL of 3x NR or Mouse/Rat dAb Diluent
Rev 1.
11
For example, a total of for 50 wells: 1,250 ÷ 3 = 417 µL of 3x NR or Mouse/Rat dAb
Diluent
7.1.6. Calculate the ddH2O volume by subtracting the volume for each capture bead stock and 3x
3x NR or Mouse/Rat dAb Diluent:
____ µL from Step 7.1.3 – ___ µL from Step 7.1.4 x ___ number of Plex (Step 7.1.1) ____ µL from Step 7.1.5 = ____ µL of ddH2O
For example, a 7-plex panel for 50 wells: 1,250 - 25 x 7 - 417 = 658 µL of ddH2O
7.1.7. Add the appropriate volume (determined in Step 7.1.6) of ddH2O to a test tube labeled
with "Working dAb Solution ".
7.1.8. Add the appropriate volume (determined in Step 7.1.5) of 3x NR or Mouse/Rat dAb Diluent
7.1.9. Add the appropriate volume (determined in Step 6.1.4.) of each dAb stock into
7.1.10.Mix by gentle vortexing. The working dAb solution can be stored at 2-8 °C for up to 24
hrs.
7.2 Premixed Multiplex Kits
Transfer the entire content of 2x NR or Mouse/Rat dAb diluent to the 2x Premixed Biotin-dAb vial. Mix
by gentle vortexing. The working solution can be stored at 2-8 oC for up to 24 hrs.
8 Preparing Antigen Standards
8.1 Reconstitution of the lyophilized standards
8.1.1 If there is only one standard vial in the kit
8.1.1.1. Centrifuge the antigen standard vial at 2000 x g for 10 sec.
8.1.1.2. Add 250 μL of CCS (cell culture supernatant) or SPB (serum/plasma/bodily fluid) standard
diluent into the vial.
8.1.1.3. Vortex gently for 15 sec.
8.1.1.4. Incubate on ice for 5-10 min.
8.1.1.5. Vortex gently for 15 sec before Serial Dilution Preparation (Step 8.2)
8.1.2 If there are multiple standard vials in the kit
8.1.2.1. Centrifuge the antigen standard vials at 2000 x g for 10 sec.
8.1.2.2. Add 250 μL of CCS (cell culture supernatant) or SPB (serum/plasma/bodily fluid) standard
diluent into the first vial.
Rev 1.
12
8.1.2.3.
8.1.2.4.
8.1.2.5.
8.1.2.6.
8.1.2.7.
8.1.2.8.
8.1.2.9.
8.1.2.10.
8.2
Vortex gently for 15 sec.
Incubate on ice for 5 min
Vortex gently for 15 sec
Transfer the entire content to the next vial
Vortex gently for 15 sec.
Incubate on ice for 5 min
Vortex gently for 15 sec
If more than 2 standard vials in the kit, repeat Steps 8.1.2.6 to 8.1.2.9 for the rest of the
vials.
Serial dilution preparation
Prepare 3x serial dilutions (160 µL in total, enough for duplicated wells) according to Table 1. Mix each
addition by pipetting up and down 4–6 times. Change pipette tips after each addition to avoid
contamination from one concentration to the other. Keep the standards on ice until use.
Table 1: Preparation of antigen Standard Curve
Standard
Amount from Previous
Standard (µL)
Standard 1 (Undiluted)
Standard 2 (1/3)
Standard 3 (1/9)
Standard 4 (1/27)
Standard 5 (1/81)
Standard 6 (1/243)
Standard 7 (1/729)
Blank
Standard Diluent (µL)
Prepared in Section 8.1
80
80
80
80
80
80
0
160
160
160
160
160
160
160
Note: If very low levels (less than 10 pg/mL) of cytokines are expected in the samples, we recommend
add one more standard point, Standard 8 (1/2187).
9
Performing the assay
9.1.
Prepare the plate template. Mark the standard, sample and blank wells. Standards and
samples should be run in duplicates or triplicates. If the whole plate will not be used, seal
the unused well with a plate seal.
Important: Place the filter plate on top of the inverted filter plate lid during the entire
assay process to prevent touching the plate bottom on any surface.
Rev 1.
13
9.2.
9.3.
9.4.
9.5.
9.6.
Add 45 µL/well of 1x Reading Buffer to each well.
Incubate for 5 min at room temperature.
Remove buffer by applying vacuum with the vacuum manifold.
Vortex working bead suspension for 15 second.
Add 45 µL of capture bead working suspension to each well.
Note: Save the remaining capture bead working suspension and store at 2-8oC with light
protection. It can be used for setting up the flow cytometer.
9.7.
9.8.
9.9.
9.10.
Remove solution by applying vacuum with the vacuum manifold.
Wash the wells three times with 100 µL wash buffer.
Gently tap the plate bottom onto several layers of paper towels to remove residual buffer
on the plate bottom after the last wash.
Add 30 µL of CCS Assay Buffer or NR SPB Assay Buffer to each sample well.
Note: Cell culture supernatant samples can be run without diluting in Assay Buffer if
very low levels (less than 20 pg/mL) of cytokines are expected. If it is the case, skip this
step and add 45 µL of cell culture supernatant samples to each sample well in Step 9.11.
9.11.
9.12.
9.13.
9.14.
9.15.
9.16.
9.17.
9.18.
9.19.
9.20.
9.21.
9.22.
9.23.
9.24.
9.25.
9.26.
9.27.
Rev 1.
Add 15 µL of samples to each sample well.
Add 45 µL of standards to each standard well.
Cover the plate with a plate seal.
Incubate on the shaker (set at 700 rpm) for 60 min at room temperature. Protect from light.
Remove the plate seal.
Wash the wells three times with 100 µL wash buffer.
Gently tap the plate bottom onto several layers of paper towels to remove residual buffer
on the plate bottom after the last wash.
Add 25 µL of biotinylated antibody working solution to each well.
Cover the plate with a plate seal.
Incubate on the shaker (set at 700 rpm) for 30 min at room temperature. Protect from
light.
Remove the plate seal.
Wash the wells three times with 100 µL wash buffer.
Gently tap the plate bottom onto several layers of paper towels to remove residual buffer
on the plate bottom after the last wash.
Add 25 µL of streptavidin-PE working solution to each well.
Cover the plate with a plate seal.
Incubate on the shaker (set at 700 rpm) for 20 min at room temperature. Protect from light.
Remove the plate seal.
14
9.28.
9.29.
9.30.
9.31.
9.32.
9.33.
9.34.
Wash the wells three times with 100 µL wash buffer.
Gently tap the plate bottom onto several layers of paper towels to remove residual buffer
on the plate bottom after the last wash.
Add 150 µL of Reading Buffer to each well to resuspend the beads.
Cover the plate with a plate seal.
Place the plate on the microtiter shaker and shake for 30 s at 1100 rpm.
Remove the plate seal.
Read on a flow cytometer.
Note: If the assayed plate is not read immediately, it can be stored at 2-8oC for up to 16 hr.
The plate should be sealed with a plate seal and protected from light.
10 Setting Up Flow cytometers
10.1 Fluorescence channels
The maximum emission of the bead classification dye is at 700 nm. It can be detected on PE-Cy5
channels of most of the flow cytometers with blue (488 nm) excitation. It can also be detected on PECy7 channels with blue (488 nm) excitation or APC channel with red (635 or 640nm) excitation if such a
florescence channel is available.
The reporter dye of the AimPlex assays is PE and can be detected on the PE channel with blue (488 nm)
excitation.
10.2 Preparing instrument setup beads
10.2.1. Blank beads: Aliquot 75 µL bead suspension from one of Blank wells from Step 9.32
into a sample tube or a well of a 96-well plate depending on the sample loading
mechanism of a flow cytomter. Add 100 to 300 µL of Reading Buffer to the tube/well.
Remaining capture bead working suspension from Step 9.6 can also be used for this
purpose.
10.2.2. Standard 1 beads: Aliquot 75 µL bead suspension from one of the Standard 1 wells
from Step 9.32 into a sample tube or a well of a 96-well plate depending on the sample
loading mechanism of a flow cytomter. Add 100 to 300 µL of Reading Buffer to the
tube/well.
Note: Add 75 µL of Reading Buffer to both Blank and Standard 1 wells. Acquisition for both
wells will be slower (less bead concentrations) during the sample acquisition step.
Rev 1.
15
When running a panel the first time, we recommend running one extra well of Standard 1 for
instrument setup purpose.
10.3 Setting up a display layout/template
1. Perform start up and verification of fluidic stability and optical alignment by following
cytometer manufacturer's recommendations.
2. Open a new protocol
3. Create the following plots and histograms:
1) A dot plot with FS (X-axis) and SS (Y-axis) in linear display mode.
2) 2 histograms of PE-Cy5 in Log display mode
3) 2 dot plots with PE (X-axis) and PE-Cy5 (Y-axis) in Log display mode
4) If PE-Cy7 or APC channel is available, create 2 histograms of PE-Cy5 in Log display mode
and 2 dot plots with PE (X-axis) and PE-Cy7 or APC (Y-axis) in Log display mode.
4. Set all compensation to zero
5. Save the protocol
10.4 Running the setup beads
10.4.1. Run the Blank beads prepared in Step 10.2.1.
1) Adjust FS and SS gains so that the bead populations are on scale (Figure 1)
2) Create Gate 1 for the smaller beads and Gate 2 for the larger beads (Figure 1)
Figure 1
3) Apply Gate 1 to one of the PE-Cy5 histogram and one of the PE/PE-Cy5 dot plot.
4) Apply Gate 2 to the other PE-Cy5 histogram and the other PE/PE-Cy5 dot plot
Rev 1.
16
5) Adjust PE-Cy5 PMT voltage so that all bead populations are clearly separated on the
histograms and dot plots (Figure 2)
6) Adjust PE PMT voltage so that the dimmest bead population is positioned within the first
decade on the PE-axis of the plot (Figure 2)
Figure 2
7) Save the protocol
10.4.2.
Run the Standard 1 beads prepared in Step 10.2.2.
1) Verify all the bead populations on the PE-axis are on scale (Figure 3)
2) Adjust PE PMT voltage if needed. If adjustment is needed, make sure rerun the Standard 8
and make sure the dimmest bead population is still visible on the PE/PE-Cy5 dot plots.
Figure 3
3) Apply proper PE-Cy5 - %PE color compensation so that the bead populations are in a
horizontal position (see Figure 4 as an example of proper color compensation setting)
Rev 1.
17
Figure 4
Over compensation should be avoided (see Figure 5 as an example of over compensation).
Figure 5
4) Save the protocol
Note: If PE-Cy7 or APC fluorescence channel is available, carry out Steps 10.4.1 and 10.4.2
for the PE-Cy7 channel for the proper PMT voltage and color compensation (usually zero)
settings.
11 Analyzing the samples
If the flow cytometer does not equipped with a 96-well plate loader, transfer the samples from the wells
to sample tubes. Acquire 200 events each bead population of the larger beads (Gate 2). For example, if
there are 3 bead populations in Gate 2 (larger beads), acquire 3 x 200 = 600 events per sample.
Save the FCS files and analyze the data using FCAP Array 3.0.
Rev 1.
18
12 Technical hints
1. Set up the vacuum manifold according to the manufacturer's instruction. Adjust the vacuum
pressure so that 45-100 µL of buffer in the wells can be clear in 3-5 second.
2. When working with samples and standards, change the pipette tips after every transfer and
avoid creating bubbles when pipetting.
3. We recommend, whenever possible, using a multi-channel pipette for reagent additions to
achieve optimal assay precision.
4. When apply plate seal to the filter plate, do not use a rubber roller. Use finger to gently
press over the plate seal to seal the plate.
5. Sample handling:
a. Cell Culture Supernatant: Remove particulates by centrifugation and assay
immediately or aliquot and store samples at ≤ -80℃. Avoid repeated freeze-thaw
cycles.
b. Serum: If using serum separator tubes, allow samples to clot for 30 minutes at room
temperature. Centrifuge for 10 minutes at 1000×g. Collect the serum fraction and
assay promptly or aliquot and store the samples at -80℃. Avoid multiple freeze-thaw
cycles. If serum separator tubes are not being used, allow samples to clot overnight at
2-8℃. Centrifuge for 10 minutes at 1000×g. Remove serum and assay promptly or
aliquot and store the samples at -80℃. Avoid multiple freeze-thaw cycles.
c. Plasma: Centrifuge samples at 1,000 x g at 4 °C for 10 min within 30 min of blood
collection. Collect the plasma fraction and assay promptly or aliquot and store the
samples at -80℃. Avoid multiple freeze-thaw cycles.
d. Thaw frozen samples on ice and mix well prior to adding to the assay wells.
e. If there is a high lipid content in serum, plasma or bodily fluid samples, centrifuge at
10,000 x g for 10 min at 2-8 °C. Collect the serum, plasma or bodily fluid fraction for
the assays.
f. If samples contain high analyte concentrations and need dilution for the assays, use
Sample Dilution Buffer (Part# P830100) for sample dilution. The exact dilution must be
determined empirically.
Rev 1.
19
13 Troubleshooting
Issue
Low event count
Low assay signal or
sensitivity
High Background
Low Precision
Clogged filter plate
Rev 1.
Possible cause
Bead aggregate
Bead settle on
the well bottom
Vacuum too
strong
Standard not
reconstituted
well
Incubation time
too short
Excess exposure
to light
Well-to-well
contamination
Poor pipetting
precision
Contamination
from
adjacent wells
High lipid
content in the
serum, plasma or
bodily fluid
samples
Recommended actions
Vortex stock and working bead suspensions well
before pipetting.
Shake plates at 1000 rpm for 30 seconds prior to
acquisition or transferring to sample tubes.
Adjust the vacuum pressure so that 45-100 µL of
buffer in the wells can be clear in 3-5 second.
Standard should be incubated on ice for 5min after
the addition of standard diluent
Follow recommended incubation time in each step
During incubation, cover the plate with aluminum
foil to minimize exposure of the beads to light
Change pipette tips after every transfer. Remove
plate seal carefully and avoid contents from one well
to mix with another.
Use calibrated pipettes.
Avoid well-to-well contamination during pipetting
and removal of plate seal
Centrifuge the samples at 10,000 x g for 10 min at 28 °C. Collect the serum, plasma or bodily fluid
fraction.
20
14 Blank Plate Layout
Rev 1.
21