MinC and MinD from P. aeruginosa assembled into copolymers with a 1:1 stoichiometry in the presence of ATP.
A, MinC and MinD assembled into straight filaments and bundles observed by EM. Bar is 200 nm. B, SDS-PAGE analysis of cosedimentation in different ratios of MinC and MinD showed that the pellet always contained a 1:1 MinC:MinD, and assembly required a minimum of 4–5 μm MinD. S, supernatant; P, pellet. C and D, the concentrations of MinC and MinD in the pellet were calculated through SDS-PAGE analysis. Each value is the average of four independent analyses.