Abstract
1 Department of Applied Chemistry and Microbiology, PO Box 56, FIN-00014 University of Helsinki, Helsinki, Finland
2 German Collection of Micro-organisms and Cell Cultures, Mascheroder Weg 1b, D-38124 Braunschweig, Germany
3 Institut für Angewandte Mikrobiologie, Justus-Liebig-Universität Giessen, Heinrich-Buff-Ring 2632, D-35392 Giessen, Germany
4 Department of Biological Sciences, 202 Life Sciences Building, Louisiana State University, Baton Rouge, LA 70803, USA
5 Electronics Production Technology, PO Box 3000, FIN-02015 Helsinki University of Technology, Helsinki, Finland