1. Department of Chemistry, Carlsberg Laboratory, Gamle Carlsberg Vej 10, DK-2500 Copenhagen, Valby, Denmark
2. Institute of Molecular Biology, Odense University, Campusvej 55, DK-5230 Odense M, Denmark
3. Department of Microbiology, University of Guelph, Ontario N1G 2WI, Canada
4. August Krogh Institute, University of Copenhagen, Universitetsparken 13, DK-2100 Copenhagen Ø, Denmark
5. Centre de Recherches sur les Macromolécules Végétales, 38041 Grenoble 9 Cedex, France
6. Institute of Food Research, Norwich Research Park, Norwich NR4 7UA, U.K.