Fig. 4: Model of reductive division and simulation results.
From: Scale invariance of cell size fluctuations in starving bacteria
a, b Single (a) and multifork (b, where #ori = 4) intracellular cycle processes. See Eq. (4) for the criterion that triggers the initiation. Progress of each cycle is represented by a coordinate \({X}_{i}^{{{{{{{{\rm{CD}}}}}}}}}(t)\), which increases at speed μi(t) and ends at \({X}_{i}^{{{{{{{{\rm{CD}}}}}}}}}(t)={X}_{i}^{{{{{{{{\rm{CD,th}}}}}}}}}\) by triggering cell division. c Illustration of cell cycles in this model. Each colored arrow represents a single intracellular cycle process. d Overlapping of the rescaled cell size distributions during starvation in the model for LB → PBS. The dashed line represents the fitted log-normal distribution (σ = 0.25(2)). (Inset) The non-rescaled cell size distributions at \(t=0,5,30,60,90,120,180,240,300,360,420,480\ \min\) from right to left. e Numerically measured division rate, B(v, t), in the model for LB → PBS. See Supplementary Note 4.B for the measurement method. (Inset) Test of the condition of Eq. (9). Here Bt(0)/Bt(t) is evaluated by Bt(0)/Bt(t) = ∫B(xV(0), 0)dx/∫B(xV(t), t)dx, with x running in the range 0 ≤ x ≤ 1.8. Overlapping of the data demonstrates that Eq. (9) indeed holds in our model.
