Figure 1.

PCA of the population structure of the CCHC participants. CCHC participants show a predominant admixture of European and Amerindian ancestries. Amerindian, Mayan from Chimaltenango Guatemala, Nahua Amerindians from central Mexico, and Quechuan Amerindians from Peru (5); CEU, Utah residents with Northern and Western European ancestry from the Centre d'Etude du Polymorphisme Humain (CEPH) collection; CHB, Han Chinese in Beijing, China; JPT, Japanese in Tokyo, Japan; MEX, Mexican ancestry in Los Angeles, California; YRI, Yoruba in Ibadan, Nigeria.