The Role of Metal Ions in the Electron Transport through Azurin-Based Junctions

We studied the coherent electron transport through metal–protein–metal junctions based on a blue copper azurin, in which ion was replaced by three different metal ions (Co, Ni and Zn). Our results show that neither protein structure nor transmission at Fermi level change significantly upon replacement. The discrepancy with previous experimental observations suggests mechanism taking place these types of is probably not fully coherent.