Alpha and beta chains of SB and DR antigens are structurally distinct.
Limited amino-terminal amino acid sequences of the HLA-controlled SB and DR antigens from the cell line PREISS (DR4/4, SB3/4) show differences in both the alpha and beta chain sequences of the two molecules. SB antigens, like DR antigens, appear to be homologues of the murine I-E antigens.
D000595:Amino Acid Sequence; D003429:Cross Reactions; D000939:Epitopes; D006682:HLA-DP Antigens; D006684:HLA-DR Antigens; D000949:Histocompatibility Antigens Class II; D006801:Humans; D007518:Isoantibodies; D046911:Macromolecular Substances
D000939:Epitopes; D006682:HLA-DP Antigens; D006684:HLA-DR Antigens; D000949:Histocompatibility Antigens Class II; D007518:Isoantibodies; D046911:Macromolecular Substances