@article {617, title = {Role of humic-bound iron as an electron transfer agent in dissimilatory Fe(III) reduction.}, journal = {Appl Environ Microbiol}, volume = {65}, year = {1999}, month = {1999 Sep}, pages = {4252-4}, abstract = {The dissimilatory Fe(III) reducer Geobacter metallireducens reduced Fe(III) bound in humic substances, but the concentrations of Fe(III) in a wide range of highly purified humic substances were too low to account for a significant portion of the electron-accepting capacities of the humic substances. Furthermore, once reduced, the iron in humic substances could not transfer electrons to Fe(III) oxide. These results suggest that other electron-accepting moieties in humic substances, such as quinones, are the important electron-accepting and shuttling agents under Fe(III)-reducing conditions.}, keywords = {Deltaproteobacteria, Electron Transport, Ferric Compounds, Humic Substances, Iron, Oxidation-Reduction}, issn = {0099-2240}, author = {Lovley, D R and Blunt-Harris, E L} }