Affiliation: | 1. Institute of Pharmaceutical Biology, Mendelssohnstraβe 1, Technical University of Braunschweig, D-38106 Braunschweig, Germany;2. Institute of Pharmaceutical Biology, University of Bonn, Nussallee 6, D-53115 Bonn, Germany;3. Department of Chemistry, University of Iowa, Iowa City, IA 52242-1294, USA;4. Institute of Microbiology, Spielmannstraβe 7, Technical University of Braunschweig, D-38106 Braunschweig, Germany |