Beta-2 microglobulin

B2M
Available structures
PDBOrtholog search: PDBe RCSB
Identifiers
AliasesB2M, entrez:567, IMD43, beta-2-microglobulin, Β2 microglobulin
External IDsOMIM: 109700; MGI: 88127; HomoloGene: 2987; GeneCards: B2M; OMA:B2M - orthologs
Orthologs
SpeciesHumanMouse
Entrez

567

12010

Ensembl

ENSG00000166710
ENSG00000273686

ENSMUSG00000060802

UniProt

P61769

P01887

RefSeq (mRNA)

NM_004048

NM_009735

RefSeq (protein)

NP_004039

NP_033865

Location (UCSC)Chr 15: 44.71 – 44.72 MbChr 2: 121.98 – 121.98 Mb
PubMed search
Wikidata
View/Edit HumanView/Edit Mouse

β2 microglobulin (B2M) is a component of MHC class I molecules. MHC class I molecules have α1, α2, and α3 proteins which are present on all nucleated cells (excluding red blood cells). In humans, the β2 microglobulin protein is encoded by the B2M gene.