Polymorphism at beta 85 and not beta 86 of HLA-DR1 is predominantly responsible for restricting the nature of the anchor side chain: implication for concerted effects of class II MHC polymorphism.

Abstract excerpt

The first hydrophobic pocket, P1, of class II MHC has been shown to be an important site of peptide anchoring. Two polymorphisms occur in this pocket in the human class II MHC beta chain at position 85 and 86. beta 85 is usually Val, occasionally Ala, whereas beta 86 can be Gly or Val. However, Ala85 is found only in conjunction with Val86. The independent effect of the polymorphism at these two positions on the...

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