1. RWTH Aachen University, AVT - Enzyme Process Technology; Worringer Weg 1 Aachen 52074 Germany
2. Institute of Biochemical Engineering; TU Braunschweig, Rebenring 56; Braunschweig 38106 Germany
3. DWI-Leibniz-Institute for Interactive Materials, Forckenbeckstraße 50; Aachen 52074 Germany