MeSH definition : Transmembrane proteins that form the alpha subunits of the HLA-DR antigens. They are
also referred to as the HLA-DR heavy chains.;
MeSH synonym : alpha-Chains, HLA-DR; HLA-DR alpha; HLA DR alpha; HLA-DR alpha-Chain; HLA DR alpha chain; alpha-Chain, HLA-DR; HLA-DRA; MHC class II antigen DRA; HLA class II histocompatibility antigen, DR alpha chain; HLA-DR heavy chain; HLA DR heavy chain; heavy chain, HLA-DR; HLA DR alpha chains;