Hla-dq

HLA-DQ

HLA-DQ (DQ) is a cell surface receptor type protein found on antigen presenting cells. DQ is an αβ heterodimer of the MHC Class II type. The α and β chains are encoded by HLA-DQA1 and HLA-DQB1, respectively. These two loci are adjacent to each other on chromosome 6p21.3. Both the α-chain and β-chain vary greatly. A person often produces two α-chain and two β-chain variants and thus 4 DQ isoforms. The DQ loci are in close genetic linkage to HLA-DR but less closely linked to HLA-DP, HLA-A, HLA-B and HLA-C.