TGFB1 and hepatocellular carcinoma: The conversion rate of epithelial hepatoma cells with high JUNB expression to CD90 positive cells upon treatment with purified TGFb1 was significantly increased compared with that in untreated cells, being 7.51% for Huh1, 10.5% for Huh7, and 10.7% for patient HCC (Fig. S5A–C).