Fig. 3From: Effect of ACE, ACE2 and CYP11B2 gene polymorphisms and noise on essential hypertension among steelworkers in China: a case–control studyAgarose gel (2%) electrophoresis of CYP11B2–344T/C. (1) TT(116 bp + 283 bp); (2) CC(71 bp + 116 bp + 212); (3) TC(71 bp + 116 bp + 212 bp + 283 bp); (4) PCR product; (5) DNA markerBack to article page