Table 1. .

Maximum-Likelihood Estimates of Ancestry Proportions in Puerto Ricans^[Note]

Marker Region	European	African	Native American
HLA-A	.51	.32	.17
HLA-B	.59	.28	.13
HLA-DRB	.55	.24	.21
HLA-DQB	.43	.37	.20
Combined (HLA)	.51	.30	.20
Genomewide	.76	.17	.07

Note.— The top five rows are estimates for the MHC region on chromosome 6; the last row is the genomewide average ancestry estimated from 15 microsatellites.¹³