Affiliation: | From the ‡Department of Biology, The University of Konstanz, D-78457 Konstanz, Germany.;the §Institute of Biochemical Engineering, Saarland University, D-66041 Saarbrücken, Germany.;the ¶Institute of Microbiology and Genetics, University of Göttingen, D-37077 Göttingen, Germany, and ;‖Agroscope Changins-Wädenswil, Swiss Federal Research Station, CH-8820 Wädenswil, Switzerland |