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Key Scientific Article”  on Renewable Energy Global Innovations

Uptake of self-secreted flavins as bound cofactors for extracellular electron transfer in Geobacter species

Energy Environ. Sci., 2014,7, 1357-1361.
Akihiro Okamoto, Koichiro Saito, Kengo Inoue, Kenneth H. Nealson, Kazuhito Hashimoto, Ryuhei Nakamura


Geobacter species are among the most efficient current-producing bacterial species, yet their electron-transfer mechanisms have been scarcely investigated at the molecular level. Here, we provide evidence that Geobacter cells secrete and utilize riboflavin as a bound-cofactor in outer-membrane c-type cytochromes. This finding highlights the potential roles of riboflavin as a major electron carrier in current production.

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