HLA-DR, MLRW, HLA-DRA1, MHC class II antigen DRA, HLA class II histocompatibility antigen, DR alpha chain, HLA DRB1, DRA,
HLA-DRA is one of the HLA class II alpha chain paralogues. This class II molecule is a heterodimer consisting of an alpha and a beta chain, both anchored in the membrane. It plays a central role in the immune system by presenting peptides derived from ex