the binding and penetration of two 125i-labeled anti-carcinoembryonic antigen ( cea ) monoclonal antibodies ( mab ) and their f ( ab ' ) 2 and fab fragments were measured in multicellular spheroids of poorly ( ht29 ) and moderately well differentiated ( co112 ) human colon adenocarcinomas which express different amounts of cea .
C0086418
human
C0007082
cea