Fig. 4.

The BoNT/B PC has a similar structure to the BoNT/A1 PC. (A) The three arms are evident in a gallery of single particles. (B) BoNT/B PC class averages obtained by reference-based alignment and classification. *Class used for the 3D reconstruction shown in C and D. Side length of panels in A and B, 420 Å. (C) Surface representation of the 3D reconstruction of BoNT/B PC. (D) Crystal structures (from Fig. 1A) placed into a mesh representation of the BoNT/B PC. (Scale bars in C and D, 50 Å.)