Fig. 4.

AcrB surrounded by different membrane curvatures exhibits identical structure. (A) 2D class averages shown different membrane curvatures around AcrB. Two representative classes stand out. (B) Reconstruction of the membrane fraction. The 3D reconstructions of the particles in the two 2D classes shown in A are low-pass filtered to 7 Å. Membrane curvatures are indicated by red and black, dashed line. (C) AcrB from the two classes are nearly identical. The two 3D reconstructions are overlaid, with the respective membrane curvatures indicated by red and black dashed lines.