Fig. 7. Round cells enhance muscle regeneration more efficiently than thick cells. Five thousand round cells (A,B) or thick cells (C), or 1,000,000 thick cells (D) derived from gastrocnemius muscles of GFP-transgenic mice were transplanted into gastrocnemius muscles of congenic C57Bl/6 mice pre-treated with CTX. The muscles were removed and cryosectioned 28 days after transplantation. Images in A-D were obtained by epifluorescence microscopy with a GFP filter. Scale bars: 100 µm in A,C,D; 50 µm in B.