Fig. 3. Immuno-electron microscopy study of Pax7 and BrdU labelling in tadpole tail. (A,B) Satellite cell with Pax7 antibody labelling in the nucleus. (C,D) High-power views of black box regions of A and B, respectively. The basement membrane is indicated by the arrows in C,D. (E) A myonucleus negative for Pax7 signal. (F) A Schwann cell with Pax7 antibody labelling in the nucleus. (G) A lymphocyte located between myofibres is positive for Pax7. (H) A fibroblast in the muscle connective tissues has a faint positive signal. (I) A satellite cell with BrdU labelling in the nucleus. (J) A myonucleus negative for BrdU.