Fig. 3. The Schizosaccharomyces pombe cell cycle. Adapted from S. A. MacNeill and P. Nurse, Cell cycle control in fission yeast. In The Molecular and Cellular Biology of the Yeast Saccharomyces. Pp. 697-763. Cold Spring Harbor Laboratory Press, 1997. The magenta and green colors indicate the two different mating types (+ and -). These colors are dimmed in spores and stationary phase to indicate genetic inactivity. In diploids, the colors are blended to indicate that the diploid nucleus contains both + and - determinants.