1. Centre for Metalloprotein Spectroscopy and Biology, School of Chemical Sciences, University of East Anglia, Norwich NR4 7TJ, U.K., Centre for Metalloprotein Spectroscopy and Biology, School of Biological Sciences, University of East Anglia, Norwich NR4 7TJ, U.K., Department of Biochemistry, University of Oxford, Oxford OX1 3QU, U.K., The Krebs Institute, Department of Molecular Biology and Biotechnology, University of Sheffield, Sheffield S10 2UH, U.K., and Lehrstuhl für Mikrobiologie, Universität...