SNP discovery in (A) SRC-1, (B) SRC-3, (C) NCoR, and (D) SMRT. Vertical lines delineate the position of SNPs identified by our resequencing effort. The height of the vertical lines represents the frequency at which the SNP was found. Black lines represent novel SNPs, grey lines represent SNPs found in dbSNP. Solid lines represent nonsynonymous SNPs, dashed lines represent synonymous SNPs. Positions of SNPs genotyped for risk associations are pointed out by arrows.