Pairwise PC Plots of HGDP Africans Colored by Cluster Assignment. The legend reports the cluster assignment, population and sample size for each cluster. The Biaka, Mandenka, Mbuti pygmy and San are separated into the first 4 clusters. The eighth cluster (black) contains the Yorubans, Bantu and 2 subjects from the Mozabite population and these subjects cluster together in each of the above plots indicating that these cannot be differentiated based on the first 7 PCs. The remaining Mozabite are split between clusters 5-7 and show variability in PC5, PC6 and PC7 suggesting that these individuals are more heterogeneous than the other African populations.