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Figure 3 Representative trichrome and MY-32 stain of grafted skeletal myoblasts. A and B show an area of the graft in a section stained with trichrome at two magnifications. In A, the myotubes can be clearly identified, and in B the higher magnification shows the presence of striated myofibers in some myotubes. C shows an adjacent section that was stained with the skeletal myosin specific MY-32 antibody.