Bio-Rad Bio-Plex Pro™ Human Th17 Cytokine Assays - Manual (Page 5)

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Figure 1. Bio-Plex sandwich immunoassay
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 reporter signal.
MAGNETIC BEAD
BIOMARKER
OF INTEREST
CAPTURE
ANTIBODY
STREPTAVIDIN
BIOTINYLATED
DETECTION
ANTIBODY
PHYCOERYTHRIN
REPORTER
FLUORESCENT