Fig 1. Distribution of PON1 enzyme activities measured in FF and serum, stratified by PON1 Q192R phenotype.

Geometric means and standard deviations (SD) of arylesterase activity (shaded bars) and paraoxonase activity (open bars) presented; differences for enzyme activities in FF and serum are significant (P < 0.0001) within each PON1 Q192R phenotype; * P < 0.0001 for difference across PON1 Q192R phenotypes; ^† n = 10 missing values; ^‡ n = 14 missing values.