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The active site of the crystal structure of Agaricus bisporus mushroom tyrosinase (Protein Data Bank, PDB ID 2Y9W). The side chains of histidine residues are rendered as sticks, while copper ions and bridging oxygen are rendered as spheres. The mode system in the present study is defined by the atoms in stick and sphere representations. The carbon, nitrogen, oxygen, and copper atoms are colored with green, blue, red, and brown, respectively.
