特異性:Recognizes a polymorphic determinant on HLA-DR molecules which is associated with DR3, DR5, and DRw6 (DRw52-like). Does not react with DRw8. Recognizes part of the HLA-D molecules (29+34kD). Determinant is strongly expressed on DR3 positive cells and more weakly on DR5 and DRw6 positive cells. Species Crossreactivity: chimpanzee, macacaapes and gorilla.