>d1d5xb2 d.19.1.1 (B:1-92) MHC class II, N-terminal domains of alpha and beta chains {Human (Homo sapiens), HLA-DR4} gdtrprfleqvkhechffngtervrfldryfyhqeeyvrfdsdvgeyravtelgrpdaey wnsqkdlleqkraavdtycrhnygvgesftvq