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. 2009 Mar 12;117(8):1226–1231. doi: 10.1289/ehp.0900569

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DZOase activities versus POase activities in sera of male and female Caucasian and African-American southerners, as well as the distribution of individuals into three PON1₁₉₂ functional genotypes (QQ, QR, and RR). Abbreviations: AAF, African-American female; AAM, African-American male; CF, Caucasian female; CM, Caucasian male. The sample population (n = 191) consisted of 47 AAFs, 46 AAMs, 49 CFs, and 49 CMs. Results from 3 AAFs, 4 AAMs, 1 CF, and 1 CF were indeterminate and thus were not included in the plot.