>d1hxyb2 d.19.1.1 (B:3-92) MHC class II, N-terminal domains of alpha and beta chains {Human (Homo sapiens), HLA-DR1} trprflwqlkfechffngtervrllerciynqeesvrfdsdvgeyravtelgrpdaeywn sqkdlleqrraavdtycrhnygvgesftvq