Fission Yeast: A Laboratory Manual (IMAGE) Cold Spring Harbor Laboratory Caption A false-colored scanning electron micrograph of vegetative rod-shaped Schizosaccharomyces pombe cells next to the product of sexual differentiation, an ascus. Credit Image courtesy of Silke Hauf and Jurgen Berger. Usage Restrictions None 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.