Supplementary Fig. S1.

Stereographic projection of the self-rotation function for the high-pH crystal form of B. licheniformis AT. The resolution was 10.0–3.0 Å and the radius of integration was 30 Å. Contours start at zero and increase in 0.6σ intervals. Crystallographic a axis is along ϕ = 0° ψ = 90° and the c∗ axis is perpendicular to the plane of the figure. The ϕ angle varies from 0° to ±180° around the plot while the ψ angle varies from 0° at the centre to 90° at the edge. (A) Section with κ = 120°, (B) Section with κ = 180°.