Figure 4.

The structure of PG-1 ion channels incorporated in DOPS/POPE lipid bilayers from high resolution AFM imaging. (A–C) Examples of channel-like structures with different subunit organizations. (D and E) Inner and outer diameters of PG-1 channels that were measured from the cross-section profile of the channel height. The red arrows mark the outer diameter, and the green arrows mark the regions where the inner diameter was measured. The graphs shown in F–H represent pore (F) inner and (G) outer diameter distributions and (H) channel subunits distribution.