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Genotyping of GSTP1 polymorphism in healthy volunteers. Polymerase chain reaction-restriction fragment length polymorphism performed on samples collected from 18 healthy volunteers indicated that the homozygous GSTP1 variant was present in one (arrow in lane 1) and heterozygous GSTP1 polymorphism in two patients (arrows in lanes 15 and 17). GSTP1, glutathione S-transferase Pi 1.
