Abstract
We analyzed the HLA-A, -B, -DR and -DQ phenotypes and 12 microsatellite locus genotypes within and close to the major histocompatibility complex in a panel of 98 randomly selected, healthy, unrelated Dutch Caucasoid individuals. Allele frequencies and Hardy-Weinberg equilibrium (HWE) were calculated. Also, the linkage disequilibrium patterns between HLA and microsatellite loci were studied. The HLA-A, -B, -DR, -DQ and six microsatellite loci centromeric of the HLA-A showed HWE. In contrast, all microsatellites telomeric of the HLA-A showed deviation from HWE due to excess of homozygosity. Linkage disequilibrium analyses provided strong evidence that among the tested microsatellite loci only the alleles of the D6STNFa locus are in linkage disequilibrium with both HLA-B and -DR. Our results suggest that selection acting on the HLA genes includes the D6STNFa locus and linked genes.
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