1. Contribution from the Department of Biochemistry and Molecular Biology, Oregon Graduate Institute of Science and Technology, P.O. Box 91000, Portland, Oregon 97291-1000, Department of Microbiology and Enzymology, Technical University of Delft, Julianalaan 67, 2628 BC Delft, The Netherlands, Chemical Sciences and Technology Division, Los Alamos National Laboratory, Mail Stop C345, Los Alamos, New Mexico 87545, Department of Chemistry and Center for Metals in Biocatalysis, University of Minnesota, 207...