Fig. 2From: The HLA profile and genetic affinities of three primitive Tamil-speaking endogamous groups: Kallars of Thanjavur, Piramalai Kallar and VanniyarPrincipal component analysis (PCA) showing of the relationship between the South Indian and other selected global populations based on frequencies of HLA-DRB1 alleles. Frequency data for other populations were from AFNDBack to article page