PMID- 21400268 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20151030 LR - 20110314 IS - 1064-3745 (Print) IS - 1064-3745 (Linking) VI - 15 DP - 1993 TI - Mapping MHC Class II Genes and Disease-Susceptibility : Use of Polymerase Chain Reaction and Dot Hybridization for Human Leukocyte Antigen Allele Typing. PG - 95-112 LID - 10.1385/0-89603-244-2:95 [doi] AB - The genes of the human leukocyte antigen (HLA) region control a variety of functions involved in the immune response and influence susceptibility to over 40 diseases. The region maps to the short arm of chromosome 6 and is divided into three regions, denoted class I, II, and III. The HLA class II gene complex is approx 1000 kb in length and is arranged into three main subregions (HLA-DP, -DQ, and -DR), each of which contains genes of two types, A and B. The A genes encode alpha-polypeptides and B genes encode beta-polypeptides; together these form the functional class II alphabeta dimer. Although some haplotypes contain up to 14 class II loci, not all are expressed, and limitations on functionally permissive heterodimer formation restricts the expressed repertoire to 4 class II molecules/haplotype: DPalphabeta, DQalphabeta, DRalphabeta(1), and DRalphabeta(3,4,5)(the second DR molecule is either DRalphabeta(3), DRalphabeta(4), or DRalphabeta(5), depending on the haplotype). With the exception of the DRA locus, the genes encoding each of these polypeptides are highly polymorphic. FAU - Bain, S C AU - Bain SC AD - John Radcliffe Hospital, University of Oxford, Headington, Oxford, UK. FAU - Todd, J A AU - Todd JA LA - eng PT - Journal Article PL - United States TA - Methods Mol Biol JT - Methods in molecular biology (Clifton, N.J.) JID - 9214969 EDAT- 1993/01/01 00:00 MHDA- 1993/01/01 00:01 CRDT- 2011/03/15 06:00 PHST- 2011/03/15 06:00 [entrez] PHST- 1993/01/01 00:00 [pubmed] PHST- 1993/01/01 00:01 [medline] AID - 10.1385/0-89603-244-2:95 [doi] PST - ppublish SO - Methods Mol Biol. 1993;15:95-112. doi: 10.1385/0-89603-244-2:95.