Killer cell immunoglobulin like receptor (KIR) is highly polymorphic in genotype, haplotype and allele levels. This study was done to investigate KIR genes frequencies, genotypes and inheritance in Mongolian. Gene-specific PCR amplification was used to identify the presence or absence of 16 KIR loci.KIR genotypes were obtained by a KIR genotypes website. The KIR genes frequencies of Mongolian were compared to 24 different populations around the world. The distribution of haplotype B in Mongolian was higher than that in Mongoloid and less than that in Caucasian. Thirty discovered genotypes and five novel genotypes were identified from 1 to 34 individuals. 37.8% of Mongolian carried KIR haplotype AA.Mongolian was exhibited between North Mongoloid and Caucasus by principal component and genetic tree analysis.
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