realizes has specified input role of has role immunoglobulin complex, circulating positive reference substance role evaluant role competitive inhibition of binding assay antibody cross-blocking assay IEDB IEDB Testing two antibodies that bind the HBV core protein for the ability of one antibody pre-incubated with the protein in solution to inhibit binding to the other antibody which is plate-bound in an ELISA format. antibody cross-blocking assay A competitive inhibition of binding assay in which two antibodies that are known to bind the same antigen are tested for the ability of one antibody to inhibit binding of the other antibody to the antigen, thereby determining if they have overlapping binding sites. antibody inhibition of antibody binding metadata complete