1. Danish Archaea Centre, Institute of Molecular Biology, Copenhagen University, Sølvgade 83H, 1307 Copenhagen K, Denmark
2. Center for Biological Sequence Analysis, Technical University of Denmark, 2800 Lyngby, Denmark
3. Epidauros Biotechnologie AG, Bernried, Germany
4. e.gene Biotechnologie GmbH, Poeckinger Fussweg 7a, 82340 Feldafing, Germany