1. 1Faculty of Chemistry, Biotechnology, and Food Science, Norwegian University of Life Sciences (NMBU), P.O. Box 5003, N-1432 Ås, Norway
2. 2Department of Biotechnology and Biomedicine, Section for Protein Chemistry and Enzyme Technology, DTU, Søltofts Plads, 224, 030 2800 Kgs. Lyngby, Denmark