"The X-ray diffraction analyses suggest that the metallic-like conductivity of G. sulfurreducens pili can be attributed to the packing of aromatic amino acids w

"The X-ray diffraction analyses suggest that the metallic-like conductivity of G. sulfurreducens pili can be attributed to the packing of aromatic amino acids with a characteristic spacing of 3.2 Å, which enables effective -orbital overlap and electron delocalization."