Drosophila melanogaster (stage 16 embryo)
Marine Biological Laboratory, Woods Hole, via ZEISS Microscopy on Flickr.
Immunostained for Tropomyosin (green; muscle), Pax 3/7 (blue; segmentally repeated nuclei in CNS and ectoderm), and anti-HRP (red; cell bodies and axons of the nervous system). All nuclei shown in gray (DAPI). Imaged with ZEISS LSM 700.