Figure 1. CryoEM reconstruction of the PA pore.
a, b, Surface representations of the cryoEM map of the PA pore at 2.9 Å resolution as viewed from the top (a) and the side (b). Individual protomers of PA heptamer are color-coded. Inset of (b) shows the unsharpened cryoEM map in which the flexible domains 4 (arrowheads) are visible.