Expression of an HLA-Bw6-related specificity by the HLA-Cw3 molecule

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Abstract
Radioimmunoassay of HLA-transformed mouse L cells expressing A3, A24, B7, or Cw3 HLA class I molecules with a set of monomorphic monoclonal antibodies distinguishes between A3–A24 and B7-Cw3 patterns of reactivity. Analyses with Bw6-specific monoclonal antibodies and a human alloantiserum demonstrate the expression by the HLA-Cw3 molecules of a Bw6 public specificity related to but not identical with that expressed by the HLA-B7 molecules. Exon-shuffling experiments and inhibition studies of monoclonal antibody cell-surface fixation indicate that similar parts of B7 and Cw3 molecules account for their serological cross-reactivity.