Supraspinatus muscles did not indicate presence of slow-twitch Myh7 (type I) in the BTX (A, C), Saline (B, E) and Normal muscles (C, F) at 28 days (top panel) and 56 days (bottom panel). The same antibody stained Myh7 fibers in the mouse soleus muscle (G) (Myh7 – red, Laminin – green, nuclei – blue) (20× objective, scale bar = 200 µm).