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Fig. S1. Relation between cytoplasmic and nuclear volume in vivo.

Fig. S2. Shift between growth rates resets cell size immediately.

Fig. S3. The simulated culture is younger than an identical ‘ideal’ culture.

Fig. S4. Altered Cln threshold levels affect cell size.

Fig. S5. Deterministic modelling yields the same qualitative results but synchrony decays more slowly.

Fig. S6. Cln over activation leads to shorter G1 duration, smaller cells and higher growth rate.

Doc. S1. Calculation of nuclear volume.

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