Deletion polymorphism of glutathione S-transferases M1 and T1 in the Tunisian population.

Background: Glutathione S-transferases (GST) play a vital role in cellular defense against environmentally toxic compounds. These enzymes present a genetic deletion polymorphism, which varies with ethnicity.

Aim: To evaluate the frequencies of homozygous deletion of GSTM1 and GSTT1 genes in Tunisian population.