Fig. 5. Cytokinesis during mitosis 15 in pim mutants. Time-lapse in vivo imaging was used for the analysis of cytokinesis during the fifteenth round of mitosis during Drosophila embryogenesis in pim1 mutant (pim1) and pim+ (pim+) sibling embryos expressing red fluorescent histone H2AvD-mRFP and a green fluorescent fusion protein marking the cell cortex. Selected frames of merged images are shown. Numbers above the frames indicate the time in minutes relative to the last metaphase frame which was set to zero. Bar in upper right frame, 5 µm.