1. Division of Biochemical Engineering, Institute of Food Technology1 and Centre of Applied Genetics2, University of Agricultural Sciences Vienna (Universität für Bodenkultur Wien, BOKU), Muthgasse 18, A-1190 Wien, Austria
2. Institute of Biochemical Technology and Microbiology, University of Technology (TU Wien), Getreidemarkt 9, A-1060 Wien, Austria3