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. 2018 Jul 16;28(4):355–364. doi: 10.1097/CEJ.0000000000000461

Fig. 4.

Fig. 4

(a) Excision repair cross complementation group 1 (ERCC1), xeroderma pigmentosum group A (XPA), and xeroderma pigmentosum group C (XPC) mRNA expression levels in human bronchial epithelial cells pretreated with 50, 100, 250, and 500 nmol/l folic acid and exposed to 32 μmol/l benzo(a)pyrene (BaP)for 12, 24, and 48 h. (b) ERCC1 protein expression levels in human bronchial epithelia cells pretreated with 50, 100, 250, and 500 nmol/l folic acid and exposed to 32 μmol/l BaP for 24 h. Data represent the mean±standard error values of three independent experiments. Compared with the positive control, *P<0.05 and **P<0.01. Compared with the negative control, #P<0.05.