Figure 4.

Dimensions and doubling times of mother cells in channels of different lengths. (A–D) Mother cell length, width, and volume at birth, and doubling time as a function of channel length. All channels are 0.9 μm wide. Each data point is an average of three independent measurements. In each measurement, more than 300 cell births have been analyzed. Error bars are s.e.m. of the three independent measurements. Blue horizontal lines correspond to measurements of these quantities from liquid culture cells. Solid lines are linear fits to data. (E) Logarithm of birth volume, V_b, as a function of inverse doubling time, $T_d^{-1}$, and it fits to the universal growth law, $V_b=\left(\frac{1}{2}\right)V_i•2^{\frac{C+D}{T_d}}$.