1. Department of Biochemistry and Molecular Biology, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark, School of Biochemistry and Microbiology, Leeds Institute of Genetics, Health and Therapeutics, University of Leeds, Leeds LS2 9JT, United Kingdom, Department of Biochemistry and Molecular Biology, University of The Basque Country, PO Box 644, 48080 Bilbao, Spain, and Cooperative Research Centre on Biosciences (CIC-BioGUNE), Technology Park of Bizkaia, 801 A Building, 48160 Derio, Spain