From: Serum paraoxonase 1 (PON1) measurement: an update
Substrate
Serum
Purified enzyme
QQ
RR
Paraoxon
0.001
0.005
0.467
2.1
Phenyl acetate
1.26
1.52
845
720
4-nitrophenyl acetate
0.022
0.04
6.4
7.3
1-naphtyl acetate
0.023
0.032
<0.01