We investigated the Gln --> Arg 191 polymorphism-in paraoxonase (PON1) in S
t. Petersburg population, in three clinically differentiated groups of pati
ents with Parkinson's disease (PD) and in the symptomatic tremor group. A n
ew approach for Gln --> Arg 191 PON1 polymorphism genotyping is suggested.
No significant differences in the groups studies as compared to the control
s was observed.