Two-photon live imaging of a dividing cardiomyocyte in an eGFP-anillin/αMHC-mCherry double transgenic E11.5 heart Time lapse videomicroscopy of a ventricular cardiomyocytes imaged without optical filtering. The complete M-phase of cell division is visualized based on the eGFP-anillin signal. Two nuclei of daughter cells become visible at 114 min (white arrows). Pictures were taken every 6 min. The time interval between the last two pictures is 125 min, frame rate = 2.5 per s. Scale bar, 10 μm.