In a Competitive-Binding Heterogeneous Assay, the Captive Phase Involves

Multiple Choice

In a competitive-binding heterogeneous assay, the captive phase involves:

A) the removal of endogenous binding proteins that interfere with the immunoassay
B) the binding of the labeled reactant in the assay
C) the capture of free, unlabeled ligands from the patient sample for use in the assay of free ligand alone
D) the initial step in the assay where the antibody binds with the ligand