FIGURE 2:

The cell cycle of fission yeast. During interphase, S. pombe cells grow from the cell tips (orange arrows) to 14 μm in length. During mitosis, the cell ceases growth, the mitotic spindle segregates chromosomes, and the actin-based contractile ring (red) assembles at the cell middle. During cytokinesis, the medial septum (blue) grows inward as the contractile ring constricts. Upon cell–cell separation, the cell wall at the septum rapidly adopts a rounded shape to form the new end. The relative size of E. coli is depicted for scale (bottom right).