FCM Multiplex Bead Assay: Revolutionary Technology for Simultaneous Multiplex Protein Quantification
Overview
Accurate and high-throughput multiplex protein quantification is a core demand for researchers in life science and clinical testing. As a multiplex protein quantification technology built on flow cytometry, FCM Multiplex Bead Assay overcomes the drawbacks of traditional single-plex detection methods with unique working principles and outstanding performance. It has become an innovative quantitative tool widely adopted in academic research, drug development and clinical diagnostics.
Advantages
The core strength of FCM Multiplex Bead Assay lies in simultaneous quantification of multiple target proteins (cytokines, chemokines, etc.) from a single micro-volume sample.
Conventional single-index assays such as ELISA suffer from low throughput, long incubation periods and massive sample consumption. FCM multiplex bead assays perfectly address these pain points. One single run generates data for multiple biomarkers, drastically boosting experimental efficiency, conserving precious samples and shortening assay timelines. This major advancement delivers a streamlined workflow for proteomic profiling of complex biological specimens.
Comparison of Protein Quantification Assays
| Technology | ELISA | TR-FRET | HICA | FCM Multiplex | MSD | Luminex |
|---|---|---|---|---|---|---|
| Detection Principle | Enzyme-linked immunosorbent assay | Time-resolved fluorescence | Homogeneous chemiluminescence | FCM Multiplex bead array | Electrochemiluminescence (ECL) | FCM bead array |
| Multiplexing Capacity | Single | Single | Single | Multiplex (≤30) | Multiplex (≤10) | Multiplex (≤100) |
| Sensitivity | +++ | ++ | ++++ | +++ | +++++ | +++ |
| Dynamic Range | 2 log | 3 log | 4 log | 3 log | 4-5 log | 3 log |
| Assay Time | 2–6 h | 0.5 h | 1 h | 4–6 h | 4–6 h | 4–6 h |
| Sample Throughput | ++ | ++++ | ++++ | ++ | ++ | ++ |
| Sample Types | Cells, Tissues, Blood | Cells, Tissues | Cells, Tissues, Blood | Cells, Tissues, Blood | Cells, Tissues, Blood | Cells, Tissues, Blood |
| Instrumentation | Microplate Reader (Abs) | Microplate Reader (TRF) | Microplate Reader (Alpha) | Flow Cytometer | MSD Reader | Luminex Reader |
Core Advantages
- Multi-analyte detection: Simultaneously measure 5–40 biomarkers per reaction tube
- Minimal sample input: Consumes far less sample than serial single-plex ELISA tests
- Rapid workflow: Total incubation time is only 70 minutes
- Excellent reproducibility: Low intra-assay and inter-assay variation for consistent data
Technical Principle: Fluorescent Encoding Combined with Immunoassay
The assay relies on a dual-laser detection system, paired with qualitative identification and quantitative calibration. The entire workflow is divided into three core segments:
FCM Multiplex Bead Assay Workflow
- Dual-laser detection system: Two distinct lasers excite separate fluorescence signals. One laser activates bead encoding fluorescence to identify biomarker types; the other excites reporter fluorescence conjugated to detection antibodies to quantify target concentration.
- Qualitative & quantitative analysis: Encoded bead fluorescence distinguishes different protein targets (qualitative readout). Reporter fluorescence intensity positively correlates with protein concentration to enable precise quantification.
- Standard curve conversion: Software generates calibration curves with serially diluted standards of known concentrations, converting raw fluorescence intensity values into absolute protein concentrations for unknown samples.
ANTBIO FCM Multiplex Bead Assay
ANTBIO FCM Multiplex Bead Assay Kits are engineered for high-throughput multiplex protein quantification. Featuring pre-mixed bead cocktails, streamlined operations, high sensitivity, broad dynamic range and customizable panels, the kits outperform comparable commercial products in key performance metrics.
Key Performance Specifications
- Sensitivity: Down to 0.5 pg/mL; certain analytes reach fg/mL detection limits
- Dynamic range: 0.5 ~ 10000 pg/mL, covering 5 orders of magnitude
- Precision: Intra-assay CV < 5%, inter-assay CV < 10% for stable, repeatable results
- Sample compatibility: Compatible with serum, plasma, cell culture supernatant and other biological matrices
- Detection throughput: Single tube supports 5–40-plex biomarker detection to fit diverse research demands
- User-friendly workflow: Pre-blended bead reagents ready for direct use; total incubation time only 70 min; magnetic plate separation replaces centrifugation for 96-well plates
Product List
| Product Name | Cat. No. | Specification | Detected Analytes |
|---|---|---|---|
| Monkey Th1/Th2/Inflammation 7-Plex Kit (Flow Cytometry Multiplex Bead Assay) | S0Q1002 | 7-plex, 96 Tests | IL-2, IL-4, IL-5, IL-6, IL-10, IFN-γ, MCP-1 |
| Human Th1/Th2 Cytokine Kit (Flow Cytometry Multiplex Bead Assay) | S0Q1001 | 7-plex, 96 Tests | IL-2, IL-4, IL-5, IL-6, IL-10, TNF-α, IFN-γ |
Performance Data
Figure 1. Standard curves of IL-2, IL-4, IL-5, IL-6, IL-10, TNF-α, IFN-γ in Assay Diluent .
Figure 2. Within the detection range, the combined cytokine proteins were added to different matrices at high concentrations. The matrices used in these experiments were diluted 2-fold with the assay buffer before the addition of the cytokine proteins. The results were compared with those of samples that had the same concentration of cytokines added in the assay buffer.
Figure 3. In the figure, the R1 gate represents the selected target capture microsphere group, which is used to define this group for subsequent detection and analysis of fluorescence signals.
Figure 4. The figure shows the distribution of microsphere clusters corresponding to different cytokines; it enables the simultaneous differentiation of multiple cytokines, providing a basis for the group definition for the subsequent quantitative analysis of each cytokine.
Figure 5. The histogram reflects the number of particles in each microsphere group.
