Fig. 4.
Linking birth, onset of constriction, and division: (A) A causal graph linking the length at birth (Lb), onset of constriction (Ln), and division (Ld). In this graph, division is solely controlled by the onset of constriction. We predict that r(Lb, Ld|Ln) = 0 for the graph. (B) A causal graph where multiple processes from birth and from the onset of constriction control division. We predict a nonzero r(Lb, Ld|Ln) for the graph. (C and D) Residuals obtained on linear regression of Ld on Ln (Ld|Ln) and Lb on Ln (Lb|Ln) are plotted for (C) Alanine medium (generation time = 213 min, N = 215 cells, ⟨nori⟩ = 1.07). (D) Glucose medium (generation time = 113 min, N = 259 cells, ⟨nori⟩ = 1.98). The conditional correlations, r(Lb, Ld|Ln) are close to zero for both of the growth conditions (consistent with graph 4A).