Biofuel Cells Controlled by Logically Processed Biochemical Signals: Towards Physiologically Regulated Bioelectronic Devices Evgeny Katz* and Marcos Pita [a]  2009 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim Chem. Eur. J. 2009, 15, 12554 – 12564 12554 DOI: 10.1002/chem.200902367