Article 2 Binary alloys 2 Coordination sphere 2 Copper 2 Copper alloys 2 Electron transfer 2 Electronic perturbations Electronic structure 2 Energy gap 2 Engineered site 2 Geometric changes 2 Ground state 2 Heme-copper oxidase 2 Orders of magnitude 2 Potential energy 2 Quantum chemistry 2 Synthetic systems 2 chemical binding 2 chemical interaction 2 chemical modification 2 chemical parameters 2 chemical structure 2 copper ion 2 electron transport 2 energy 2 geometry 2 mutation 2 structure analysis 2