Figure 1. mRNA and protein expression levels of myostatin in C2C12 myocytes, three days after introduction of knockdown plasmids (n=5 per group). a Myostatin mRNA expression levels, normalized to HPRT expression, were denoted as the myostatin/HPRT ratio. b Representative Western blot patterns of myostatin and α -tubulin. c Myostatin protein levels, normalized to the level of α-tubulin. ** p < 0.01 vs U6 control.