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Test ID: FGF23    
Fibroblast Growth Factor 23 (FGF23), Plasma

Method Description Describes how the test is performed and provides a method-specific reference

The kit uses 2 affinity-purified goat antibodies that bind at the carboxy terminal portion of fibroblast growth factor 23 (FGF23). One antibody is coated onto microtiter wells and the other is biotinylated. Horseradish peroxide conjugated to avidin and 3.3', 5,5'-tetramethylbenzidine (TMB) substrate provide the colored product, which is read in a microtiter plate spectrophotometer.(Jonsson KB. Zahradnik R. Larsson T, et al: Fibroblast growth factor 23 in oncogenic osteomalacia and X-linked hypophosphatemia. N Engl J Med 2003;348:1656-1663)

PDF Report Indicates whether the report includes an additional document with charts, images or other enriched information


Analytic Time Defines the amount of time it takes the laboratory to setup and perform the test. This is defined in number of days. The shortest interval of time expressed is "same day/1 day," which means the results may be available the same day that the sample is received in the testing laboratory. One day means results are available 1 day after the sample is received in the laboratory.

1 day

Specimen Retention Time Outlines the length of time after testing that a specimen is kept in the laboratory before it is discarded

3 months

Performing Laboratory Location The location of the laboratory that performs the test