The average plasma Lp-PLA2 concentration [ Lp-PLA2 ( V/V ) : 129.4 ng/mL , Lp-PLA2 ( V/F ) : 70.7 ng/mL , Lp-PLA2 ( F/F ) : 0.4 ng/mL ] and activity [ Lp-PLA2 ( V/V ) : 164.3 nmol/min/mL , LpPLA2 ( V/F ) : 100.9 nmol/min/mL , Lp-PLA2 ( F/F ) : 11.6 nmol/min/mL ] were significantly different between each genotype , although the basic clinical characteristics were similar .