luminescence. photosensitizers. biotin-streptavidin interaction #{149} digoxin #{149} cyclosporine#{149} thyrotropin#{149} hepatitis #{149} chorionic gonadotropin Development of a sensitive homogeneous immunoassay methodology has been the goal of numerous researchefforts [1, 2]. A method thatwould eliminatethe need to separatebound from free labeled analyte(and the associatedwash steps)would be