Fig. 7. Cyclin B is not degraded in the abnormal anaphase tws^618/5 mks¹ cells. Typical mitotic figures from mks¹ (A,D,G), tws^618/5 (B,E,H) and tws^618/5mks¹ (C,F,I) cells stained to reveal microtubules (green), DNA (blue) and cyclin B (red). The panels of monochrome staining show chromosomes (D-F) and cyclin B (G-I) alone. Cyclin B is not degraded in mks¹, tws^618/5 or tws^618/5 mks¹ double mutant cells. We use the same criteria to define the abnormally resolved anaphases of the twins/aar mutants as Gomes et al. (Gomes et al., 1993) and Mayer-Jaekel et al. (Mayer-Jaekel et al., 1993).

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