Fig. 4From: Genetic polymorphisms of human cytochrome P450 CYP1A1 in an Egyptian population and tobacco-induced lung cancerPortion of the sequencing phoregram of exons 3–6 of CYP1A1 gene showing c.857 T > C (I286T) polymorphism found in only one subject. The arrow indicates the site of the variant nucleotide positionBack to article page