Movie 15

Time-lapse confocal microscopy of GFP-NMY-2, mCherry-PAR-2 at the equatorial plane in control one-cell stage C. elegans embryos. Time-lapse movies were acquired using FV3000 Confocal system, 60X 1.4 NA objective, with high-sensitivity cooled GaAsP detection unit (Olympus Corporation, Japan) at 1 frame every 10 seconds with the z-step size of 0.5 μm covering a thickness of 3-3.5 μm. Maximum z-projection is shown, played at 20 frames/sec. Note the appearance of PAR-2 polarity axis is coincident with NMY-2 exclusion from the posterior cell cortex at the time of polarity establishment.