Drosophila ovarian egg chamber.
Day 10 of development of a Drosophila ovarian egg chamber assembly line. The nuclei of follicle and nurse cells were labeled with propidium iodide (Cat. No. P1304MP, P3566, P21493) and visualized by confocal laser-scanning microscopy using excitation by the 568 nm spectral line of an Ar–Kr laser. Image contributed by Sandra Orsulic, University of North Carolina at Chapel Hill.