The E haplotype block with the alleles indicated for the most common E haplotypes in Africans (E-1) and Europeans (E-2). SNPs tagging the haplotype block are indicated; however, using only SNPs rs4821481 and rs3732462 is sufficient for inferring the E-1 haplotype. The frequencies of the 3 genotypes for the MYH9 E-1 haplotype (rs4821480, rs2032487, rs4821481, and rs3752462), the most frequent haplotype containing the 4 SNPs, are shown for AAs with biopsy-proven HIVAN cases and hypernormal controls infected with HIV for 8 or more years with normal kidney function. Odds ratios and P values for the recessive model comparing focal and segmental glomerulosclerosis cases and controls are shown. Abbreviations: AA, African American; E, extended; EA, European American; HIV, human immunodeficiency virus; HIVAN, human immunodeficiency virus–associated nephropathy; OR, odds ratio; SNP, single-nucleotide polymorphism.