Fig. 2. Effect of RGTA on C2.7 cell growth. (A) Effect of different concentrations of RGTA (0.1 to 20 µg/ml) on cell proliferation. Cells were counted at day 4 and each value is the mean±s.d. of four cultures. (B) Growth of C2.7 myoblasts in the presence of heparin (10 µg/ml) or RGTA (0.5 µg/ml). DNA was measured in cellular extracts at the indicated times. Each point is the mean±s.d. of three determinations on three independent cultures.