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Fibroblast growth factor 23 (FGF23), a 32 kDa secreted protein, is a member of the FGF family. More specifically, it is a part of a subfamily that also includes FGF19 and FGF21. FGF23 is predominantly secreted by osteocytes and osteoblasts. The primary function is to regulate vitamin D metabolism and phosphate homeostasis. Secreted levels of FGF23 have been observed to go awry in certain tumor lines resulting in overproduction of FGF23 and hypophosphatemia. Further, elevated levels of FGF23 have been suggested as a biomarker for chronic kidney disease, where an early sign is altered phosphorus metabolism.
AlphaLISA technology allows the detection of molecules of interest in a no-wash, highly sensitive, quantitative assay. In an AlphaLISA assay, a biotinylated anti-analyte antibody binds to the Streptavidin-coated Donor beads while another anti-analyte antibody is conjugated to AlphaLISA Acceptor beads. In the presence of the analyte, the beads come into close proximity. The excitation of the Donor beads causes the release of singlet oxygen molecules that triggers a cascade of energy transfer in the Acceptor beads, resulting in a sharp peak of light emission at 615 nm.
|Assay Target Class||Protein|
|Experimental Type||In vitro|
|Product Brand Name||AlphaLISA|
|Shipping Condition||Blue Ice|
|Unit Size||5,000 Assay Points|
The introduction of enzyme-linked immunosorbent assays (ELISAs) in the early 1970’s offered researchers a non-radiometric immunoassay platform without compromising sensitivity. Over the last 50 years scientists have made huge strides in disease research and drug discovery and a demand for greater assay throughput and sensitivity has evolved. In response, more robust immunoassays have been developed to address some of the limitations of the standard, colorimetric ELISA.
Find out about the most common limitations of traditional ELISAs and how different ELISA alternative technologies address these limitations.