Fig. 2.

After BaCl₂ injury, Pax7⁺ satellite cells and Tcf4⁺ fibroblasts expand rapidly in close proximity to one another and regenerating myofibers. (A-G,CC) MyHCemb⁺ regenerating myofibers. (H-N,DD,GG) Pax7⁺ satellite cells. (O-U,EE,HH) Tcf4⁺ muscle connective tissue (MCT) fibroblasts. (V-BB,FF) Sirius Red⁺ MCT. Arrows in I, P and Q label a few of the PHH3⁺ Pax7⁺ or PHH3⁺Tcf4⁺ cells. (II) Tibialis anterior (TA) cross-sectional area measured on Sirius Red-stained sections 30-40 μm from TA origin. At each time point, adjacent sections are shown. Scale bar: 100 μm for A-BB. For all graphs, mean ± s.e.m. are plotted.