Schematic model of MinC binding to polymeric MinD and FtsZ. MinD is known to bind to the membrane via an extreme C-terminal amphipathic helix. MinCCTD, bound to MinD, interacts with the C-terminal tail of FtsZ. MinCNTD binds to α10 of FtsZ located at the interface of FtsZ subunits within a FtsZ filament. The distance between α10s within the FtsZ polymer is about 43 Å. Dimensions of MinCNTD are 40 Å × 52 Å (Fig. 2a).