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Sequence alignment of the four copper-binding sites in the 13 A. niger ATCC 1015 MCOs with N. crassa ascomycete laccase (LacC), S. cerevisiae ferroxidase (Fet3) and A. nidulans fungal pigment MCO (YA). Numbers indicate the histidine (H) and cysteine (C) copper ligands, according to the type of Cu they bind [56].
