1. Department of Biochemistry and Biophysics; The Arrhenius Laboratories for Natural Sciences; Stockholm University; SE-106 91 Stockholm Sweden
2. Department of Chemistry and Biochemistry; University of Bern; Freiestrasse 3 CH-3012 Bern Switzerland
3. Department of Biochemistry; University of Illinois at Urbana Champaign, Urbana; Illinois 61801 United States
4. Department of Marine Biotechnology and Resources; National Sun Yat-sen University; Kaohsiung 80424 Taiwan