Fig. 12. BrdU incorporation in Xenopus tadpole muscle shown by
immunostaining and counterstained with Haematoxylin (BrdU in red). (A)
Transverse section. (B) Longitudinal section. Positive cells are indicated by
red arrows, and are mostly the flat nuclei at the edges of myofibres,
indicative of satellite cells. Scale bars: 5 µm.