HLA-A23

Proteintransmembrane receptor/ligand

Structureαβ heterodimer

SubunitsHLA-A*2301, β₂-microglobulin

Older namesHL-A9

HLA-A23
(MHC Class I, A cell surface antigen)
HLA-A23
About
Protein	transmembrane receptor/ligand
Structure	αβ heterodimer
Subunits	HLA-A*2301, β2-microglobulin
Older names	HL-A9
Subtypes
Subtype allele Available structures A23 *2301
Alleles link-out to IMGT/HLA database at EBI

HLA-A23 (A23) is a human leukocyte antigen serotype within HLA-A serotype group. The serotype is determined by the antibody recognition of α²³ subset of HLA-A α-chains. For A23, the alpha, "A", chain are encoded by the HLA-A*23 allele group and the β-chain are encoded by B2M locus.^[1] This group currently is dominated by A*2301. A23 and A*23 are almost synonymous in meaning. A23 is a split antigen of the broad antigen HLA-A9 and it is a sister serotype of HLA-A24.

A23 is common in Africa and regions of the Middle East, Mediterranean, and India than Europe, East Asia or the Americas.