Fig. 2 | Nature Communications

Fig. 2

From: Simulations suggest a constrictive force is required for Gram-negative bacterial cell division

Fig. 2

Cell wall synthesis under constrictive force. a A snapshot of the peptidoglycan (PG) cylinder showing that the force caused an initial constriction at the midcell before insertion of new PG. b A snapshot of the sacculus after new PG was inserted showing that when the force per circumference was Fc = 15.6pN/nm, further constriction did not occur as new PG was inserted. c When Fc = 31.8pN/nm, constriction occurred as new PG was inserted. d Profiles of the midcell radius with respect to the amount of new PG inserted show that PG insertion-induced constriction occurred only if Fc was >19.6pN/nm. The arrow indicates the initial constriction by the force before new PG insertion started. Each trace presents the average of four simulations. Error bars indicate standard deviation. e The dependence of the midcell radius on the force before new PG was inserted shows that the midcell became relaxed at Fc = 19.6 pN/nm. The blue arrow indicates the radius before the force was applied. The green arrow indicates the radius of a relaxed cell wall

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