employing an enzyme-linked immunosorbent assay ( elisa ) in which binding of individual peroxidase-labeled mc antibodies to immobilized ( solid-phase ) detergent-disrupted sin was inhibited specifically by one or more unlabeled antibodies , viral epitopes could be grouped into six spatially distinct antigenic sites -- five on e1 , designated a through e , and one site on e2 .
C0003316
epitopes
C0003320
antigenic