Figure 3.
Myostatin is expressed in adult myoblasts derived from satellite cells. (A) Agarose gel electrophoresis of myostatin ORF amplified in a combined RT-PCR reaction using total RNA from adult myoblasts (lane 2). Amplicons are not detected in the absence of template (negative control) (lane 3). 1-kb plus DNA ladder is shown in lane 1. (B) Western analysis from proteins isolated from adult myoblasts cultured for 48 h showing both the full-length (52 kD) and LAP (38 kD) peptides of Myostatin. (C) Representative immunofluorescence showing the presence of Myostatin in wild-type adult myoblasts (i) and absence in myostatin-null (Mstn−/−) myoblasts (iii). DAPI staining of the nuclei is shown in the corresponding fields (ii and iv).