1. Danish Institute for Fisheries Research, Department of Seafood Research, Søltofts Plads, DTU Bldg. 221, DK-2800 Kongens, Lyngby, Denmark
2. Center for Microbial Biotechnology, BioCentrum, Technical University of Denmark, DK-2800 Kongens, Lyngby, Denmark
3. Department of Ecology, The Royal Veterinary and Agricultural University, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Denmark
4. Institut für Organische Chemie, TU Braunschweig, Hagenring 30, D-38106 Braunschweig, Germany