Fig. 6

Mini-ring after 3D reconstruction and segmentation. a Overall organization of the FtsZ mini-ring with individual strands shown in different colors. b Distribution of protofilament curvature measured in the left- and right-hand side of the mini-ring (LHS and RHS, respectively). c A protofilament with 4- to 6-nm longitudinal repeats highlighted by yellow arrowheads. d Twisted filaments (double helix) with a pitch between 10 and 15 nm. White and green arrowheads are separated by 360° each, i.e., one turn along the central axis. e Intertwined superhelices. In c–e, the accompanying panels highlight the position of the featured objects (marked by an arrow) in the mini-ring. Scale bars correspond to 100 nm in a, 5 nm in c and 10 nm in d, e