Please check Busalmen J P Esteve N ez A Bern A Feliu J M C type Cytochromes Wire Electricity Producing Bacteria to Electrodes Angewandte Chemie International Edition 47 4874 4877 2008 5 Esteve Nunez A Sosnik J Visconti P Lovely D R Fluorescent properties of c type cytochromes reveal their potential role as an extracytoplasmic electron sink in Geobacter sulfurreducens Environ Microbiol 10 497 505 2008 Currently nanowires are being discarded as the main electron shuttle