UQCR10 and hepatocellular carcinoma: Immuno-histochemistry confirmed these findings: UQCR10 protein expression was seen in both the cytoplasm of non-neoplastic liver tissues (Fig. 4A) and in the cytoplasm of hepatocellular carcinoma (Fig. 4B), but showed low to absent expression in HepG2 and Huh7 cell lines (Fig. 4, panels C,D).