Results from STRUCTURE version 2.3 on genotype data for 12,999 randomly selected SNPs in 578 founder (unrelated) individuals from the CEU, ASW, LWK, MKK and YRI HapMap populations. The no-admixture model showed that the data was best fit by 6 inferred ancestral populations. Each column represents an individual, and the colors indicate the fractions of their genotype attributable to ancestry from each of the 6 ancestral populations.