Fig. 3. (a) Overall structure of HasA capturing Co-Ph4Pc. Co-Ph4Pc is shown as a purple stick model (PDB ID: 6JLG). (b) Enlarged view of the Co-Ph4Pc-binding site in HasA. The Fo–Fc electron density map of Co-Ph4Pc contoured at the 2.5 σ level is shown as a grey mesh. (c) Surrounding amino acids that form the cavity for accommodation of the phenyl groups of Co-Ph4Pc. Phenyl groups are shown in white.
