Fig. 1.

Simultaneous sarcomerogenesis in Drosophila abdominal body muscles. (A-D) Images of developing dorsal abdominal muscles (arrowheads) expressing Lifeact-Ruby (red) and Mhc-GFP (green) at 30 h (A), 40 h (B), 50 h (C) and 60 h (D) APF from a spinning disc confocal movie (Movie 1). (A′-D′) Relative Mhc-GFP intensities from representative longitudinal lines drawn within an abdominal dorsal muscle at the respective time points; Mhc-GFP expression appears between 40 h and 50 h APF simultaneously across the muscle fiber (B′,C′). (A″-D″) Schemata of developing dorsal abdominal muscles, Mhc-GFP is indicated in white. Scale bar: 25 µm.