1. Department
of Chemical Engineering, Norwegian University of Science and Technology, Sem Sælandsvei 4, 7491 Trondheim, Norway
2. Department
of Biology, Norwegian University of Science and Technology, Høgskoleringen
5, 7491 Trondheim, Norway
3. Program
in Biochemistry, Mount Holyoke College, South Hadley, Massachusetts 01075, United States