Coppers: I = cyan, II=magenta; III=blue (with polypeptide).
	Coppers: I (with ligands) = cyan, II=magenta; III=blue.
	Coppers: I = cyan, II (with ligands, yellow=water) = magenta; III=blue.
	Coppers: I = cyan, II = magenta; III = blue (with ligands, yellow=bridging OH).