Abstract
Recent developments of hybridoma technology have allowed us to prepare a bispecific monoclonal antibody recognising both the tumour-associated antigen carcinoembryonic antigen (CEA) and the cytostatic vinca alkaloids. The yields of the hybrid-hybrid 28.19.8 monoclonal after affinity chromatography purification are close to 50% of the total Ig produced. The hybrid-hybrid has a molecular weight ca. 150,000 daltons. The heavy chains of the hybrid-hybrid are a gamma 1 heavy chain from the parental anti-CEA monoclonal and a gamma 2a heavy chain from the anti-vinca alkaloid donor lymphocytes.