Spatiotemporal pattern of mymx mRNA expression. (A) Fluorescence in situ hybridisation for mymx mRNA expression (magenta, top panel) in wild-type embryos fixed at 24 hpf co-stained with DAPI (green, bottom panel) (scale bars: 50 µm). (B) Transverse sections of myotomes showing mymx expression at different somite stages (scale bars: 20 µm).

Myocyte fusion is essential for muscle development, and fusion defects cause myopathies in humans. Sunandan Dhar & co describe dynamic expression and function of the myocyte #fusogen, Myomixer, during #zebrafish #myogenesis. doi.org/10.1242/bio....