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Top. A representation of secondary structure of PHMcc, PDB code 1PHM. The backbone is in gray, the strands are in cyan and the coppers are shown as green spheres. The ligands to the two catalytic coppers are colored by element (carbon is gray, nitrogen is blue, sulfur is yellow, and oxygen is red). Bottom. Coordination ligands of CuH and CuM sites. Coppers are shown by green spheres and ligands are colored by element.
