Fig. 7.

Intracellular tracer dye injections into single muscle fibers and electrocytes at the level of the distal-most ventral fin reveal no cell fragmentation. Fluororuby (red) was injected into single electrocytes (A) and muscle fibers (B) and visualized 7 days after injection by retracting the overlying skin of the fish. Tail sections at the level of the distal-most region of the ventral fin were processed for immunolabeling and viewed under a fluorescent microscope. (C) Region of a cryosection containing muscle fibers injected with Fluororuby Dextran (red) and counterstained with DAPI (blue). (D) Same image as C showing only DAPI labeling. Scale bars: (A) 20 mm; (D) 10 mm. Reproduced from Weber et al. (Weber et al., 2012).