The kit is a competitive enzyme immunoassay for in vitro quantitative measurement of F-TESTO in human serum, plasma and other biological fluids This ELISA kit uses Competitive-ELISA as the method. The microtiter plate provided in this kit has been pre-coated with Human F-TESTO. During the reaction, Human F-TESTO in the sample or standard competes with a fixed amount of Human F-TESTO on the solid phase supporter for sites on the Biotinylated Detection Ab specific to Human F-TESTO. Excess conjugat