1. Section for Protein Chemistry and Enzyme Technology, Department of Biotechnology and Biomedicine, Technical University of Denmark, Kgs. Lyngby 2800, Denmark
2. Life Sciences Institute, Department of Microbiology and Immunology, The University of British Columbia, 2350 Health Sciences Mall, Vancouver V6T1Z3, Canada
3. Faculty of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences (NMBU), Chr. M. Falsens Vei 1, NO-1430 Ås, Norway