Affiliation: | 1. Laboratoire de Biologie Moléculaire des Plantes Supérieures, University of Geneva, 1 ch. de l'Impératrice, CH-1292, Chambésy/Genève, Switzerland 2. Department of Biology, McMaster University, 1280 Main Street West, L8S 4K1, Hamilton, Ontario, Canada 3. Plasmid and Molecular Genetics Unit, National Collection of Type Cultures, Central Public Health Laboratory, 61 Colindale Ave, NW9 5HT, London, UK
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