. "An exemplary primary binding agent that utilizes antibody binding for the target binding moiety and biotin or avidin/streptavidin for the targetable construct binding moiety is described in Goldenberg, U.S. Pat. No. 5,525,338, entitled ???Detection and Therapy of Lesions with Biotin/Avidin Conjugates.??? Description of biotin and avidin/streptavidin conjugation to antibodies and other species is w" . . .