Figure 2.
a) The 90 K x-ray crystal structure of BtuB T156R1 (PDB ID: 3RGM) determined at 2.6Å showing the R1 side chain (in a stick representation) and the positions of the nearest neighbor residues in a Corey, Pauling Koltun rendering. In b) and c) are shown alternate views of the site around T156R1, with the van der Waals surface shown in grey. In b) the 2Fo-Fc electron density is shown as blue mesh contoured at 1σ. Data collection and refinement statistics are given in Table 1.
