This assay employs the competitive inhibition enzyme immunoassay technique. The microtiter plate provided in this kit has been pre-coated with an antibody specific to GH1. Standards or samples are added to the appropriate microtiter plate wells with Biotin-conjugated GH1. A competitive inhibition reaction is launched between GH1 (Standards or samples) and Biotin-conjugated GH1 with the pre-coated antibody specific for GH1. The more amount of GH1 in samples, the less antibody bound by Biotin-conj