Fig. 2From: Extracellular electron transfer from cathode to microbes: application for biofuel productionThe broad range of redox potential in c-type cytochromes. Considering the possibility of bidirectional electron flow (cathodic, anodic), the broad redox potential suggests the direction of electron flow would be flexible in an electron transfer channel consisting of cytochrome C. The number in a square bracket represents the citation number in the reference listBack to article page