The 3D reconstruction of an unfixed OM extension from S. oneidensis wild type with all of the observed interior (putative MtrA) and exterior (putative MtrC) densities marked as model points in green and red, respectively (corresponds to Fig. 7A). Also shown is the 3D isosurface view of the OM extension with the putative EET proteins (corresponds to Fig. 7C). The 3D reconstruction (tomogram) is shown slice by slice.