B2MG_HORSE Beta-2-microglobulin Component of the class I major histocompatibility complex (MHC). Involved in the presentation of peptide antigens to the immune system (By similarity). 118 B2M MARVVALVLLGLLSLTGLEAVPRVPKVQVYSRHPAENGKPNFLNCYVSGFHPPEIEIDLLKNGEKMKVDRSDLSFSKDWSFYLLVHTDFTPNGVDEYSCRVQHSTLKDPLIVKWDRDL