Table 1.

Summary of PON’s substrate activities.

Activity	PON1	PON2	PON3
Organophosphate	Yes [18]	No [4]	No (except paraoxonase) [4]
Arylesterase	Yes [25,27]	Yes, but very low [4,27]	Yes, but mostly low [5]
Lactonase	Yes [25]	Yes [33]	Yes, high [36]
Eicosanoid	Yes [4]	Little or no [4]	Yes [4,32]