1. Laboratory of Applied Microbiology1 and
2. Department of Microbiology, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, 9751 NN Haren,2 and
3. Snow Brand European Research Laboratories B.V., 9747 AN Groningen,3 The Netherlands; and
4. Department of Microbiology, University of Otago, Dunedin, New Zealand4
5. Laboratory of Microbial Resources and Ecology,5 Research Group of Molecular Bioscience, Division of Applied Bioscience, Graduate School of Agriculture, Hokkaido University, Sapporo 060-8589, Japan;