Table 2

Inhibition of meperidine hydrolysis by hCE-1

Inhibitors	Inhibition
Inhibitors	10 μM	1 mM
	%
NaF	100	100
Phenylmethylsulfenyl fluoride	17	100
Eserine	16	47
Dibucaine	0	6
Diazinon	6	42
Malathion	0	10
Methyl parathion	4	78

Percent inhibition was normalized to the activity without inhibitors.