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: NAT2 PCR products from constitutive DNA of patients with colorectal cancer, following digestion with restriction enzymes: (A) Kpn I; (B) DdeI; (C) TaqI; and (D) BamHI, illustrating four NAT2 polymorphic sites. Band sizes (in base pairs) are given for polymorphic sites (+ and -) and constant bands (c). Restriction patterns for each enzyme are illustrated: homozygous wild type; heterozygous; and homozygous mutant. MkV denotes molecular weight marker.
