Figure 3
Effect of PIF concentration on the chymotrypsin-like enzyme activity of the proteasome in C2C12 myotubes in the absence (×) or presence (▪) of U7311 (5 μ M) (A) or D609 (200 μ M) (B). The inhibitors were added to the cells 2 h prior to PIF. The experiment was repeated three times (n=9). Differences from the control are indicated as b, P<0.001, while differences from those in the absence of inhibitors are indicated as c, P<0.001.
