A monoclonal antibody recognizing a determinant common to HLA-A3 and All

Abstract
Spleen cells from a mouse immunized with an AML cell expressing HLA-A3 produced a hybridoma secreting an anti-HLA—A3, All monoclonal antibody, 26D3. By complement-dependent cytotoxicity at dilutions to 1:104 the ascites antibody lysed 13/13 A3. 15/15 A11, and 8 other lymphocytes from a panel of 98 donors. The 26 D3 immunoprecipitated a molecule consisting of subunits of 44,000 and 12,000 daltons. Monoclonality of the antibody was demonstrated by isoelectric focusing and protein A affinity chromatography.