STRUCTURE was also used to compare the AA sample in this study with the EA sample analyzed in a recent study (Levran et al., 2008). Although two clear clusters were observed, K was set to 3 for better display of the results in the yielded triangle plot. The coordinates of any given point in this triangle are given by the relative distance to each edge (putative population). Individuals who are in one of the corners are therefore assigned completely to a particular population.
