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  • Title: Sequence similarity between HLA-DR1 and DR4 subtypes associated with rheumatoid arthritis and proteus/serratia membrane haemolysins.
    Author: Ebringer A, Cunningham P, Ahmadi K, Wrigglesworth J, Hosseini R, Wilson C.
    Journal: Ann Rheum Dis; 1992 Nov; 51(11):1245-6. PubMed ID: 1466602.
    Abstract:
    Rheumatoid arthritis (RA) is found more often in subjects carrying the HLA-DR1 antigen and some subtypes of the HLA-DR4 antigen than in those without these antigens. Analysis of probes specific for HLA-DR4 has shown that amino acids encoding positions 69-74 (EQRRAA) of the beta chain indicates susceptibility to RA. A hexamer sequence of proteus haemolysin spanning residues 32-37 (ESRRAL) has been identified which resembles biochemically, and discriminates by charge, between HLA types associated with RA (DR1, Dw4, Dw14, Dw15), and those not linked with the disease (Dw10, Dw13).
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