Miriam Rosenbaum and Largus T. Angenent
Biotechnological utilization of microbial processes normally starts with the
discovery, investigation, and understanding of naturally occurring microbial
reactions. Biomolecular tools can help us, not only to gain better understanding
of protein reactions; they also enable us to influence reaction properties. For
efficient practical applications, modern biological techniques allow us to tailor
these microbial reactions to optimize the desired functionality.
We are still in the infancy of our understanding of microbial reactions in
microbial fuel cells (MFCs), or more generally in bioelectrochemical systems
(BES). One major pathway of electron transfer to a MFC anode is the direct
# 2010 IWA Publishing. Bioelectrochemical Systems: From Extracellular Electron Transfer to
Biotechnological Application. Edited by Korneel Rabaey, Largus Angenent, Uwe Schro¨der and
Ju¨rg Keller. ISBN: 9781843392330. Published by IWA Publishing, London, UK.
extracellular electron transfer by means of cell membrane bound redox-proteins.
Thus far, Shewanella oneidensis and Geobacter sulfurreducens have been