FIG. 5.

Impact of the absence of Clb2 on cell viability, expressed as the cell density, during senescence and acquisition of survival in various recombination mutants. Cells were grown in liquid cultures at 29°C and diluted every 24 h to 10⁵ cells/ml with fresh medium (see Materials and Methods); this represents the standard conditions, while in the experiments shown in Fig. 4 the daily dilutions had been deliberately lowered.