1.5.99.B2 analysis construction of a L-proline/O2 biofuel cell. On the anode, the electrocatalytic oxidation of L-proline by L-proline dehydrogenase is observed in the presence of ferrocenecarboxylic acid as mediator. On the cathode, electrocatalytic oxygen reduction is detected. The final biofuel cell using these electrodes achieves a current density of 6.00 microA/cm2 -, 765373 1.5.99.B2 medicine proline dehydrogenase is involved in type I hyperprolinemia 689987