Figure 1
Induction of sphere cells from HCC cell lines. The sphere cells from a single cell at day 7 (A; SK-HEP-1, B; HLE) and day 14 (C; SK-HEP-1, D; HLE) in sphere induction culture medium. Induction began with a cell density of 1 × 105 cells/mL, and cultivated for 7 days (E, from SK-HEP-1 and F, from HLE).