Fig. 5. Early mitotic exit when nimU function is lost. Mitotic progression in the presence and absence of nimU function was monitored by following G2/M synchronised cells (strains CP1/1 and CP1/6) through mitosis. Synchrony was achieved by utilising the temperature sensitivity of the nimA5 allele. Samples were taken through the time course indicated and the chromosome mitotic index (A), the spindle mitotic index (B), and the rate of entry into mitosis (C), were determined.