Different expression of SDHB in human ovarian carcinoma tissues. (A) The mRNA expression of SDHB in ovarian carcinoma tissues (n = 18) and normal ovarian epithelium tissues (n = 7) by real-time PCR (N = normal ovarian epithelium, M = ovarian carcinoma). (B) SDHB protein level in ovarian carcinoma and normal ovarian epithelium by western blot, M1 and M2 represent different patients. (C) SDHB mRNA expression in primary ovarian carcinoma (n = 7) and the corresponding metastasis (n = 7) by real-time PCR. Mean ± SEM. *P < 0.05 and **P < 0.01.