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Electrophoresis in 3% agarose gel after staining with ethidium bromide showing PCR-RFLP analysis of the TGF-β1 − 509 C/T polymorphism. Lane 1: 100 bp ladder, Lanes 2, 3: CT genotype, Lanes 4, 5, 7, 10, 11: CC genotype, Lanes 6, 8: TT genotype, Lane 9: no product.
