Fig. 1.
C2C12 differentiation time course. Representative photomicrographs of C2C12 myocytes at the time differentiation was initiated (day 0) and after 1–4 days of differentiation in differentiation media (DM; control) or DM with 250 ng/ml of insulin-like growth factor I (IGF-I). Bar in top right corner = 200 μm.