The major histocompatibility complex of sheep (OLA) and two minor loci.
Among 11 lymphocyte factors defined in sheep, 9 are the products of multiple alleles at 2 closely linked loci: OLA-A and OLA-B. A tenth factor is the product of a gene at a third locus: OL-X probably on the same chromosome, but in this case very distant from OLA. The last factor is the product of a gene at a fourth locus: OL-Z, independent of OLA-A and B.
D000483:Alleles; D000818:Animals; D002874:Chromosome Mapping; D003433:Crosses, Genetic; D005260:Female; D005787:Gene Frequency; D005796:Genes; D005838:Genotype; D006238:Haploidy; D008214:Lymphocytes; D008285:Major Histocompatibility Complex; D008297:Male; D012756:Sheep / Q000235:genetics*