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HLA-DRB1 Antigen Profile
HLA-DRB1 belongs to the HLA class II beta chain paralogs. The class II molecule is a heterodimer consisting of an alpha (DRA) and a beta chain (DRB), both anchored in the membrane. It plays a central role in the immune system by presenting peptides derived from extracellular proteins. Class II molecules are expressed in antigen presenting cells (APC: B lymphocytes, dendritic cells, macrophages). The beta chain is approximately 26-28 kDa. It is encoded by 6 exons. Exon one encodes the leader peptide\; exons 2 and 3 encode the two extracellular domains\; exon 4 encodes the transmembrane domain\; and exon 5 encodes the cytoplasmic tail. Within the DR molecule the beta chain contains all the polymorphisms specifying the peptide binding specificities. Hundreds of DRB1 alleles have been described and typing for these polymorphisms is routinely done for bone marrow and kidney transplantation. DRB1 is expressed at a level five times higher than its paralogs DRB3, DRB4 and DRB5. DRB1 is present in all individuals. Allelic variants of DRB1 are linked with either none or one of the genes DRB3, DRB4 and DRB5. There are 4 related pseudogenes: DRB2, DRB6, DRB7, DRB8 and DRB9.
Alternative names and synonyms associated with HLA-DRB1
major histocompatibility complex, class II, DR beta 1 (hla-drb1) ELISA Kit
major histocompatibility complex, class II, DR beta 1 (HLA-DRB1) ELISA Kit
MGC108235 ELISA Kit
DRB1 ELISA Kit
DRw10 ELISA Kit
HLA-DR1B ELISA Kit
HLA-DRB ELISA Kit
SS1 ELISA Kit
Protein level used designations for HLA-DRB1
major histocompatibility complex, class II, DR beta 1
, HLA class II histocompatibility antigen, DR-1 beta chain
, MHC class II HLA-DR beta 1 chain
, MHC class II HLA-DR-beta cell surface glycoprotein
, MHC class II HLA-DRw10-beta
, MHC class II antigen
, human leucocyte antigen DRB1
, lymphocyte antigen DRB1