Figure 2.

Structure of flagellar FlhB_c. (a) Ribbon representation of the crystal structures of Salmonella and Aquifex FlhB_C. (b) Electrostatic potential mapped onto the surface of Salmonella FlhB_C. Electrostatics were calculated using the APBS software (Baker et al., 2001 ▶) and plotted at ±5kT e⁻¹. (c) Evolutionarily conserved residues of FlhB_C. The figure was prepared with ConSurf (http://consurf.tau.ac.il/; Ashkenazy et al., 2010 ▶). Residues are coloured according to the conservation in amino-acid sequences of 200 different FlhB proteins. Arrows mark the position of the autocleavage site between β1 and β2.