Time-Lapse of An Oocyte (VIDEO) Institute of Science and Technology Austria This video is under embargo. Please login to access this video. Caption Time-lapse of an exemplary oocyte labeling both cytoplasm (bright area) and yolk granules (dark area) during the first four cleavage cycles and imaged by confocal microscopy. As the zebrafish egg cell starts to divide, cytoplasm and yolk granules are segregated. Credit IST Austria/Heisenberg group Usage Restrictions with credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.