(E) Single EDL myofibers were cultured for 48 hrs before staining for Pax7 (red) and MyoD (green). Quantifications of the numbers of each population, Pax7+MyoD-, Pax7-MyoD+, or Pax7+MyoD+, are shown on the right (n=3 mice, each). Scale bar = 50 µm. 