article 20 copper sulfate 20 nonhuman 18 controlled study 12 unclassified drug 10 Copper 8 Fungi 8 Laccase 8 enzyme activity 8 laccase 8 Copper Sulfate 6 Copper sulfate 6 Fomes 6 Fomes sclerodermeus 6 Metal ions 6 Metals 6 animal experiment 6 enzyme synthesis 6 fungus 6 manganese peroxidase 6 molecular weight 6 Binding energy 4 Electrospray ionization 4 Enzymes 4 Ligands 4 Lignin 4 Manganese peroxidase 4 Mass spectrometry 4 Positive ions 4 Proteins 4