Figure 3.

Comparison of the electrostatic potential at the solvent-accessible surface for Cp-CutA1 (PDB entry 4e98). The orientation in face 1 (a) is the same as in Fig. 1 ▶(a), with face 2 (b) being a 180° y-axis rotation of face 1. The view in (c) is a side projection generated by a 90° y-axis rotation of face 2 (b). The black circles represent the positions of negatively charged sites associated with copper binding in the P. horikoshii crystal structure (PDB entry 1uku). Red and blue represent negative and positive charge, respectively, while white is indicative of electronically neutral and hydrophobic character.