1A6A, 1AQD, 1BX2, 1D5M, 1D5X, 1D5Z, 1D6E, 1DLH, 1FV1, 1FYT, 1H15, 1HXY, 1J8H, 1JWM, 1JWS, 1JWU, 1KG0, 1KLG, 1KLU, 1LO5, 1PYW, 1R5I, 1SEB, 1SJE, 1SJH, 1T5W, 1T5X, 1YMM, 1ZGL, 2FSE, 2G9H, 2IAM, 2IAN, 2ICW, 2IPK, 2OJE, 2Q6W, 2WBJ, 2XN9, 3C5J, 3L6F, 3O6F, 3PDO, 3PGC, 3PGD, 3QXA, 3QXD, 3S4S, 3S5L, 3T0E, 4AEN, 4AH2, 4E41, 4FQX, 4GBX, 4H1L, 4C56, 4H25, 4H26, 4I5B, 4IS6, 4MCY, 4MCZ, 4MD0, 4MD4, 4MD5, 4MDI, 4MDJ, 4OV5, 4Y19, 4Y1A, 4X5X, 4X5W3122100504404ENSG00000226260ENSG00000234794ENSG00000277263ENSMUSG00000036322P01903P04224P01904NM_019111NM_010381NP_061984NP_034511HLA class II histocompatibility antigen, DR alpha chain is a protein that in humans is encoded by the HLA-DRA gene.

The polypeptide subunit encoded by this gene belongs to the HLA class II alpha chain paralogues.

The class II protein is a heterodimer consisting of an alpha (DRα) and a beta chain (DRβ), both anchored in the membrane.

It plays a central role in the immune system by presenting peptides derived from extracellular proteins.

[4] There are two different HLA-DRA chains in the human population coded by three different DRA alleles: This protein-related article is a stub.