Serum deprivation enhances DNA synthesis of human hepatoma SMMC-7721 cells

Figure 1 Effects of serum deprivation and serum levels on the incorporation of ³H-TdR. (A) The cpm value after cells were treated in different serum concentrations for 6 h; (B) for 12 h; (C) for 18 h; (D) for 24 h.

Figure 2 A Morphology of human hepatoma SMMC-7721 cells cultured in serum-free medium for 6 h photographed under phase contrast microscope (200 ×) B Morphology of human hepatoma SMMC-7721 cells cultured in 5% serum medium for 6 h photographed under phase contrast microscope (200 ×) C Morphology of human hepatoma SMMC-7721 cells cultured in 25% serum medium for 6 h photographed under phase contrast microscope (200 ×)