Direct electron transfer reaction of a blue protein from Alcaligenes faecalis strain 6

The direct election tranfer reaction of a copper‐containing blue protein from Alcaligenes faecalis strain 6 (AfBP) was investigated. AfBP showed quasi‐reversible electron transfer kinetics at an edge‐plane—oriented pyrolytic graphite electrode (PGE) without any electrode modifier. Investigation of the effect of solution conditions on the reaction suggested that a weak electrostatic interaction between the electrode and the protein facilitates the electron transfer.