The electroactivity of adsorbed flavocytochrome c 3, a tetraheme FAD-containing
flavoenzyme isolated from the bacterium Shewanella putrefaciens, is investigated by cyclic
voltammetry at an edge plane pyrolytic graphite electrode before and after modification with
grafted catechol serving as an efficient pH sensor based on a redox readout.
Flavocytochrome c 3 adsorption onto the unmodified or modified electrode surface is
successfully achieved by cyclic voltammetry (100 consecutive cycles) in a flavocytochrome c …

A century after the demonstration that electrons from microbial metabolism can be harvested
with electrodes, electron transfer processes in biofilms of microorganisms performing
respiration on extracellular solids are now being studied in order to increase the
performance of microbial electrochemical technologies such as microbial fuel cells.
Extracellular electron transfer occurring at the microorganism/electrode interface stimulated
a wide range of fundamental and applied studies because of important implications in …