1. Institute of Bioprocess Engineering and Pharmaceutical Technology, University of Applied Sciences Mittelhessen, Giessen, Germany;
2. Fraunhofer Institute for Molecular Biology and Applied Ecology (IME), Project group Bioresources, Giessen, Germany;
3. Faculty of Biology and Chemistry, Justus Liebig University, Giessen, Germany;
4. Department of Chemical Engineering, Kansas State University, Manhattan, KS, USA