Hydrothermal vents and the origin of life (original) (raw)

• Corliss, J. B. et al. Submarine thermal springs on the Galapagos rift. Science 203, 1073–1083 (1979).
  Article CAS PubMed Google Scholar
• Spiess, F. N. et al. East Pacific rise: hot springs and geophysical experiments. Science 207, 1421–1433 (1980).
  Article CAS PubMed Google Scholar
• Baross, J. A. & Hoffman, S. E. Submarine hydrothermal vents and associated gradient environments as sites for the origin and evolution of life. Orig. Life Evol. Biosph. 15, 327–345 (1985).
  Article CAS Google Scholar
• Kelley, D. S. et al. An off-axis hydrothermal vent field near the Mid-Atlantic Ridge at 30°N. Nature 412, 145–149 (2001). Reports the discovery of the LCHF and important differences of LCHF geochemistry compared with black smokers.
  Article CAS PubMed Google Scholar
• Kelley, D. S. et al. A serpentinite-hosted ecosystem: the Lost City hydrothermal field. Science 307, 1428–1434 (2005).
  Article CAS PubMed Google Scholar
• de Wit, M. J. Early Archean processes: evidence from the South African Kaapvaal craton and its greenstone belts. Geologie en Mijinbouw 76, 369–371 (1998).
  Article Google Scholar
• Baker, E. T. & German, C. R. in Mid-Ocean Ridges: Hydrothermal Interactions between the Lithosphere and Oceans (eds German, C., Lin, J. & Parson, L. M.) 245–266 (American Geophysical Union, Washington DC, 2004).
  Google Scholar
• Hammond, S. R. Offset caldera and crater collapse on Juan de Fuca ridge-flank volcanoes. Bull. Volcanol. 58, 617–627 (1997).
  Article Google Scholar
• Delaney, J. R. et al. The quantum event of oceanic crustal accretion: impacts of diking at mid-ocean ridges. Science 281, 222–230 (1998).
  Article CAS PubMed Google Scholar
• Embley, R. W. & Lupton, J. E. in The Subseafloor Biosphere at Mid-Ocean Ridges (eds Wilcock, W. S. D., DeLong, E. F., Kelley, D. S., Baross, J. A. & Cary, S. C.) 75–97 (American Geophysical Union, Washington DC, 2004).
  Book Google Scholar
• Karson, J. A., Früh-Green, G. L., Kelley, D. S., Williams, E. A., Yoerger, D. R. & Jakuba, M. Detachment shear zone of the Atlantis Massif core complex, Mid-Atlantic ridge, 30°N. Geochem. Geophys. Geosyst. 7, Q06016 (2006).
  Google Scholar
• Kelley, D. S., Baross, J. A. & Delaney, J. R. Volcanoes, fluids, and life at mid-ocean ridge spreading centers. Annu. Rev. Earth Planet Sci. 30, 385–491 (2002).
  Article CAS Google Scholar
• Von Damm, K. L. et al. Extraordinary phase separation and segregation in vent fluids from the southern East Pacific Rise. Earth Planet Sci. Lett. 206, 265–378 (2003).
  Article Google Scholar
• Von Damm, K. L. in Physical, Chemical, Biological, and Geological Interactions within Seafloor Hydrothermal Systems (eds Humphris, S., Zierenberg, R., Mullineau, L. & Thomson R.) 222–247 (American Geophysical Union, Washington DC, 1995).
  Google Scholar
• Kashefi, K. & Lovley, D. R. Extending the upper temperature limit for life. Science 301, 934 (2003).
  Article CAS PubMed Google Scholar
• Little, C. T. S., Cann, J. R., Herrington, R. J. & Morisseau, M. Late Cretaceous hydrothermal vent communities from the Troodos Ophiolite, Cyprus. Geology 27, 1027–1030 (1999).
  Article Google Scholar
• Rasmussen, B. Filamentous microfossils in a 3,235-million-year-old volcanogenic massive sulphide deposit. Nature 405, 676–679 (2000).
  Article CAS PubMed Google Scholar
• Ludwig, K. A., Kelley, D. S., Butterfield, D. A., Nelson, B. K. & Früh-Green, G. Formation and evolution of carbonate chimneys at the Lost City Hydrothermal Field. Geochim. Cosmochim. Acta 70, 3625–3645 (2006).
  Article CAS Google Scholar
• Früh-Green, G. L. et al. 30,000 years of hydrothermal activity at the Lost City Vent Field. Science 301, 495–498 (2003).
  Article PubMed CAS Google Scholar
• Proskurowski, G., Lilley, M. D., Kelley, D. S. & Olson, E. J. Low temperature volatile production at the Lost City Hydrothermal Field, evidence from a hydrogen stable isotope geothermometer. Chem. Geol. 229, 331–343 (2006).
  Article CAS Google Scholar
• Blackman, D. K. et al. Geology of the Atlantis massif, (Mid-Atlantic Ridge 30°N): implications for the evolution of an ultramafic oceanic core complex. Mar. Geophys. Res. 23, 443–469 (2002).
  Article Google Scholar
• Proskurowski, G. et al. Abiogenic hydrocarbon production at lost city hydrothermal field. Science 319, 604–607 (2008). Reports isotopic evidence which indicated that CH 4 and volatile hydrocarbon production at Lost City is a geochemical, not a biological, process. This study therefore implicates serpentinization in abiogenic carbon reduction, which could be highly relevant in an origin-of-life context.
  Article CAS PubMed Google Scholar
• Ludwig, K. A., Kelley, D. S., Shen, C., Cheng, H. & Edwards, R L. U/Th geochronology of carbonate chimneys at the Lost City hydrothermal field. Eos Trans. AGU 86, V51B–1487 (2005).
• Bach, W., Banerjee, N. R., Dick, H. J. B. & Baker, E. T. Discovery of ancient and active hydrothermal systems along the ultra-slow spreading Southwest Indian Ridge 10°–16°E. Geochem. Geophys. Geosystems 3, 1044 (2002).
  Article Google Scholar
• Dick, H. J. B., Lin, J. & Schouten, H. An ultraslow-spreading class of ocean ridge. Nature 426, 405–412 (2003).
  Article CAS PubMed Google Scholar
• Edmonds, H. N. et al. Discovery of abundant hydrothermal venting on the ultraslow-spreading Gakkel ridge in the Arctic. Nature 421, 252–256 (2003).
  Article CAS PubMed Google Scholar
• Schrenk, M. O., Kelley, D. S., Bolton, S. & Baross, J. A. Low archaeal diversity linked to sub-seafloor geochemical processes at the Lost City Hydrothermal Field, Mid-Atlantic Ridge. Environ. Microbiol. 6, 1086–1095 (2004).
  Article CAS PubMed Google Scholar
• Brazelton, W. J., Schrenk, M. O., Kelley, D. S. & Baross, J. A. Methane and sulfur metabolizing microbial communities dominate in the Lost City hydrothermal vent ecosystem. Appl. Environ. Microbiol. 72, 6257–6270 (2006).
  Article CAS PubMed PubMed Central Google Scholar
• Orphan, V. J., House, C. H., Hinrichs, K. U., McKeegan, K. D. & DeLong, E. F. Direct phylogenetic and isotopic evidence for multiple groups of Archaea involved in the anaerobic oxidation of methane. Geochim. Cosmochim. Acta 66, A571 (2002).
  Google Scholar
• Teske, A. et al. Microbial diversity of hydrothermal sediments in the Guaymas Basin: evidence for anaerobic methanotrophic communities. Appl. Environ. Microbiol. 68, 1994–2007 (2002).
  Article CAS PubMed PubMed Central Google Scholar
• Aloisi, G. I. et al. CH4-consuming microorganisms and the formation of carbonate crusts at cold seeps. Earth Planet. Sci. Lett. 203, 195–203 (2002).
  Article CAS Google Scholar
• Boetius, A. et al. A marine microbial consortium apparently mediating anaerobic oxidation of methane. Nature 407, 623–626 (2000).
  Article CAS PubMed Google Scholar
• Michaelis, W. et al. Microbial reefs in the Black Sea fueled by anaerobic oxidation of methane. Science 297, 1013–1015 (2002).
  Article CAS PubMed Google Scholar
• Orphan, V. J. et al. Comparative analysis of methane-oxidizing archaea and sulfate-reducing bacteria in anoxic marine sediments. Appl. Environ. Microbiol. 67, 1922–1934 (2001).
  Article CAS PubMed PubMed Central Google Scholar
• Thomsen, T. R., Finster, K. & Ramsing, N. B. Biogeochemical and molecular signatures of anaerobic methane oxidation in a marine sediment. Appl. Environ. Microbiol. 67, 1646–1656 (2001).
  Article CAS PubMed PubMed Central Google Scholar
• Hallam, S. J. et al. Reverse methanogenesis: testing the hypothesis with environmental genomics. Science 305, 1457–1462 (2004).
  Article CAS PubMed Google Scholar
• Meyerdierks, A. et al. Insights into the genomes of archaea mediating the anaerobic oxidation of methane. Environ. Microbiol. 7, 1937–1951 (2005).
  Article CAS PubMed Google Scholar
• Raghoebarsing, A. et al. A microbial consortium couples anaerobic methane oxidation to denitrification. Nature 440, 918–921 (2006).
  Article CAS PubMed Google Scholar
• Girguis, P. R., Cozen, A. E. & DeLong E. F. Growth and population dynamics of anaerobic methane-oxidizing archaea and sulfate-reducing bacteria in a continuous-flow bioreactor. Appl. Environ. Microbiol. 71, 3725–3733 (2005).
  Article CAS PubMed PubMed Central Google Scholar
• Hoehler, T. M., Alperin, M. J., Albert, D. B. & Martens, C. S. Field and laboratory studies of methane oxidation in an anoxic marine sediment: evidence for a methanogen–sulfate reducer consortium. Global Biogeochem. Cycles 8, 451–463 (1994).
  Article CAS Google Scholar
• Nauhaus, K., Boetius, A., Kruger, M. & Widdel, F. In vitro demonstration of anaerobic oxidation of methane coupled to sulphate reduction in sediment from a marine gas hydrate area. Environ. Microbiol. 4, 296–305 (2002).
  Article CAS PubMed Google Scholar
• Nauhaus, K., Treude, T., Boetius, A. & Krüger, M. Environmental regulation of the anaerobic oxidation of methane: a comparison of ANME-I and ANME-II communities. Environ. Microbiol. 7, 98–106 (2005).
  Article CAS PubMed Google Scholar
• Schouten, S., Wakeham, S. G., Hopmans, E. C. & Damste, J. S. S. Biogeochemical evidence that thermophilic archaea mediate the anaerobic oxidation of methane. Appl. Environ. Microbiol. 69, 1680–1686 (2003).
  Article CAS PubMed PubMed Central Google Scholar
• Kallmeyer, J. & Boetius, A. Effects of temperature and pressure on sulfate reduction and anaerobic oxidation of methane in hydrothermal sediments of Guaymas Basin. Appl. Environ. Microbiol. 70, 1231–1233 (2004).
  Article CAS PubMed PubMed Central Google Scholar
• Boetius, A. Lost City life. Science 307, 1420–1422 (2005).
  Article CAS PubMed Google Scholar
• Moran, J. J. et al. Methyl sulfides as intermediates in the anaerobic oxidation of methane. Environ. Microbiol. 10, 162–173 (2008).
  CAS PubMed Google Scholar
• Bada, J. L. & Lazcano, A. Some like it hot, but not the first biomolecules. Science 296, 1982–1983 (2002).
  Article CAS PubMed Google Scholar
• Orgel, L. E. The implausibility of metabolic cycles on the prebiotic Earth. PLoS Biol. 6, e18 (2008).
  Article PubMed PubMed Central CAS Google Scholar
• Fuchs, G. CO2 fixation in acetogenic bacteria: variations on a theme. FEMS Microbiol. Rev. 39, 181–213 (1986).
  Article CAS Google Scholar
• Fuchs, G. & Stupperich, E. in Evolution of Prokaryotes (eds Schleifer, K. H. & Stackebrandt, E.) 235–251 (Academic, London, 1985).
  Google Scholar
• Berg, I. A., Kockelkorn, D., Buckel, W. & Fuchs, G. A 3-hydroxypropionate/4-hydroxybutyrate autotrophic carbon dioxide assimilation pathway in Archaea. Science 318, 1782–1786 (2007).
  Article CAS PubMed Google Scholar
• Thauer, R. K. A fifth pathway of carbon fixation. Science 318, 1732–1733 (2007).
  Article CAS PubMed Google Scholar
• Thauer, R. K., Kaster, A. K., Seedorf, H., Buckel, W. & Hedderich R. Methanogenic archaea: ecologically relevant differences in energy conservation. Nature Rev. Microbiol. 6, 579–591 (2008). Provides the most recent summary of methanogen bioenergetics and explains important and newly recognized differences in the energy metabolism of methanogens that possess cytochromes compared with those that lack cytochromes.
  Article CAS Google Scholar
• Müller, V. Energy conservation in acetogenic bacteria. Appl. Environ. Microbiol. 69, 6345–6353 (2003).
  Article PubMed PubMed Central CAS Google Scholar
• Maden, B. E. H. Tetrahydrofolate and tetrahydromethanopterin compared: functionally distinct carriers in C1 metabolism. Biochem. J. 350, 609–629 (2000).
  Article CAS PubMed PubMed Central Google Scholar
• Rother, M. & Metcalf, W. W. Anaerobic growth of Methanosarcina acetivorans C2A on carbon monoxide: an unusual way of life for a methanogenic archaeon. Proc. Natl Acad. Sci. USA 101, 16929–16934 (2004).
  Article CAS PubMed PubMed Central Google Scholar
• Shock, E. L. Geochemical constraints on the origin of organic compounds in hydrothermal systems. Orig. Life Evol. Biosph. 20, 331–367 (1990).
  Article CAS Google Scholar
• Shock, E. L., McCollom, T. M. & Schulte, M. D. in Thermophiles: The Keys to Molecular Evolution and The Origin of Life? (eds Wiegel, J. & Adams, M. W. W.) 59–76 (Taylor and Francis, London, 1998).
  Google Scholar
• McCollom, T. M. & Seewald, J. S. Experimental constraints on the hydrothermal reactivity of organic acids and acid anions: I. Formic acid and formate. Geochim. Cosmochim. Acta 67, 3625–3644 (2003).
  Article CAS Google Scholar
• McCollom, T. M. & Seewald J. S. Abiotic synthesis of organic compounds in deep-sea hydrothermal environments. Chem. Rev. 107, 382–401 (2007).
  Article CAS PubMed Google Scholar
• Lang, S. Q., Butterfield, D., Hedges, J. & Lilley, M. Production of isotopically heavy dissolved organic carbon in the Lost City Hydrothermal Vent Field. Eos Trans. AGU 86, V43C–06 (2005).
  Google Scholar
• Lang, S. Q., Butterfield, D. & Lilley, M. Organic geochemistry of Lost City Hydrothermal fluids. InterRidge Theoretical Institute 'Biogeochemical interaction at deep-sea vents' [online], (2007).
  Google Scholar
• Martin, W. & Russell, M. J. On the origin of biochemistry at an alkaline hydrothermal vent. Philos. Trans. R. Soc. Lond. B 367, 1187–1925 (2007).
  Google Scholar
• Russell, M. J. & Hall, A. J. The emergence of life from iron monosulphide bubbles at a submarine hydrothermal redox and pH front. J. Geol. Soc. London 154, 377–402 (1997).
  Article CAS PubMed Google Scholar
• Cody, G. D. Transition metal sulfides and the origin of metabolism. Annu. Rev. Earth Planet. Sci. 32, 569–599 (2004).
  Article CAS Google Scholar
• Heinen, W. & Lauwers, A. M. Organic sulfur compounds resulting from the interaction of iron sulfide, hydrogen sulfide and carbon dioxide in an anaerobic aqueous environment. Orig. Life Evol. Biosph. 26, 131–150 (1996). Detected Fe(II)- and hydrogen sulphide-dependent CO 2 reduction of methyl sulphide and other compounds under mild conditions as might have been encountered in Hadean hydrothermal vents.
  Article CAS PubMed Google Scholar
• Huber, C. & Wächtershäuser, G. Activated acetic acid by carbon fixation on (Fe, Ni)S under primordial conditions. Science 276, 245–247 (1997). Detected Fe(II)- and Ni(II)-dependent synthesis of acetate and the thioester acetyl methyl sulphide from CO and methyl sulfide under conditions as might have been encountered in Hadean hydrothermal vents.
  Article CAS PubMed Google Scholar
• Wächtershäuser, G. From volcanic origins of chemoautotrophic life to Bacteria, Archaea and Eukarya. Philos. Trans. R. Soc. Lond. B 361, 1787–1806 (2006).
  Article CAS Google Scholar
• Ferry, J. G. & House, C. H. The step-wise evolution of early life driven by energy conservation. Mol. Biol. Evol. 23, 1286–1292 (2006).
  Article CAS PubMed Google Scholar
• Leman, L., Orgel, L. & Ghadiri, M. R. Carbonyl sulfide-mediated prebiotic formation of peptides. Science 306, 283–286 (2004).
  Article CAS PubMed Google Scholar
• Russell, M. J., Daniel, R. M., Hall, A. J. & Sherringham, J. A hydrothermally precipitated catalytic iron sulphide membrane as a first step toward life. J. Mol. Evol. 39, 231–243 (1994).
  Article CAS Google Scholar
• Amend, J. P. & Shock, E. L. Energetics of overall metabolic reactions of thermophilic and hyperthermophilic Archaea and Bacteria. FEMS Microbiol. Rev. 25, 175–243 (2001).
  Article CAS PubMed Google Scholar
• Mitchell, P. Coupling of phosphorylation to electron and hydrogen transfer by a chemi-osmotic type of mechanism. Nature 191, 144–148 (1961).
  Article CAS PubMed Google Scholar
• Berry, S. The chemical basis of membrane bioenergetics. J. Mol. Evol. 54, 595–613 (2002).
  Article CAS PubMed Google Scholar
• Schäfer, G., Engelhard, M. & Müller, V. Bioenergetics of the Archaea. Microbiol. Mol. Biol. Rev. 63, 570–620 (1999).
  PubMed PubMed Central Google Scholar
• Baymann, F. et al. The redox protein construction kit: pre-last universal common ancestor evolution of energy conserving enzymes. Philos. Trans. R. Soc. Lond. B 358, 267–274 (2003).
  Article CAS Google Scholar
• Junge, W. ATP synthase and other motor proteins. Proc. Natl Acad. Sci. USA 96, 4735–4737 (1999).
  Article CAS PubMed PubMed Central Google Scholar
• Murata, T., Yamato, I., Kakinuma, Y., Leslie, A. G. W. & Walker, J. E. Structure of the rotor of the V-type Na+-ATPase from Enterococcus hirae. Science 308, 654–659 (2005).
  Article CAS PubMed Google Scholar
• Kaesler, B. & Schönheit, P. The role of sodium ions in methanogenesis. Formaldehyde oxidation to CO2 and 2 H2 in methanogenic bacteria is coupled with primary electrogenic Na+ translocation at a stoichiometry of 2–3 Na+/CO2 . Eur. J. Biochem. 184, 223–232 (1989).
  Article CAS PubMed Google Scholar
• Baaske, P., Weinert, F. M., Duhr, S., Lemke, K. H., Russell, M. J. & Braun, D. Extreme accumulation of nucleotides in simulated hydrothermal pore systems. Proc. Natl Acad. Sci. USA 104, 9346–9351 (2007).
  Article CAS PubMed PubMed Central Google Scholar
• Braun, D. & Libchaber, A. Thermal force approach to molecular evolution. Phys. Biol. 1, P1–P8 (2004).
  Article CAS PubMed Google Scholar
• Koonin, E. V. An RNA-making reactor for the origin of life. Proc. Natl Acad. Sci. USA 104, 9105–9106 (2007).
  Article CAS PubMed PubMed Central Google Scholar
• Joyce, G. F. The antiquity of RNA-based evolution. Nature 418, 214–221 (2002).
  Article CAS PubMed Google Scholar
• Oparin, A. I. The Origin of Life (Dover, New York, 1952).
  Google Scholar
• Haldane, J. B. S. The origin of life. Rationalist Annual 148, 3–10 (1929).
  Google Scholar
• Miller, S. L. A production of amino acids under possible primitive Earth conditions. Science 117, 528–529 (1953).
  Article CAS PubMed Google Scholar
• Bada, J. L. How life began on Earth: a status report. Earth Planet. Sci. Lett. 226, 1–15 (2004).
  Article CAS Google Scholar
• Orgel, L. E. Prebiotic chemistry and the origin of the RNA World. Crit. Rev. Biochem. Mol. Biol. 39, 99–123 (2004).
  Article CAS PubMed Google Scholar
• de Duve, C. Vital Dust: Life as a Cosmic Imperative (Basic Books, New York, 1995).
  Google Scholar
• Schulte, M., Blake, D., Hoehler, T. & McCollom, T. M. Serpentinization and its implications for life on the early Earth and Mars. Astrobiology 6, 364–376 (2006).
  Article CAS PubMed Google Scholar
• Bach, W. et al. Unraveling the sequence of serpentinization reactions: petrography, mineral chemistry, and petrophysics of serpentinites from MAR 15°N (ODP Leg 209, Site 1274). Geophys. Res. Lett. 33, L13306 (2006).
  Article CAS Google Scholar
• Sleep, N. H., Meibom, A., Fridriksson, T., Coleman, R. G. & Bird, D. K. H2-rich fluids from serpentinization: geochemical and biotic implications. Proc. Natl Acad. Sci. USA 101, 12818–12823 (2004).
  Article CAS PubMed PubMed Central Google Scholar
• Fisher, A. T. Marine hydrogeology: recent accomplishments and future opportunities. Hydrogeol. J. 13, 69–97 (2005).
  Article Google Scholar
• Cech, T. R. A model for the RNA-catalyzed replication of RNA. Proc. Natl Acad. Sci. USA 83, 4360–4363 (1986).
  Article CAS PubMed PubMed Central Google Scholar
• Gilbert, W. The RNA world. Nature 319, 618 (1986).
  Article Google Scholar
• White, H. B. Coenzymes as fossils of an earlier metabolic state. J. Mol. Evol. 7, 101–104 (1976).
  Article CAS PubMed Google Scholar
• Bartoschek, S., Vorholt, J. A., Thauer. R. K., Geierstanger, B. H. & Griesinger, C. _N_-carboxymethanofuran (carbamate) formation from methanofuran and CO2 in methanogenic archaea. Thermodynamics and kinetics of the spontaneous reaction. Eur. J. Biochem. 267, 3130–3138 (2000).
  Article CAS PubMed Google Scholar
• Morowitz, H. J., Kostelnik, J. D., Yang, J. & Cody, G. D. The origin of intermediary metabolism. Proc. Natl Acad. Sci. USA 97, 7704–7708 (2000).
  Article CAS PubMed PubMed Central Google Scholar
• Schrenk, M. O., Kelley, D. S., Delaney, J. R. & Baross, J. A. Incidence and diversity of microorganisms within the walls of an active deep-sea sulfide chimney. Appl. Environ. Microbiol. 69, 3580–3592 (2003).
  Article CAS PubMed PubMed Central Google Scholar
• Pagé, A., Tivey, M. K., Stakes, D. S. & Reysenbach, A.-L. Temporal and spatial archaeal colonization of hydrothermal vent deposits. Environ. Microbiol. 10, 874–884 (2008).
  Article PubMed CAS Google Scholar
• Seewald, J. S., Zolotov, M. Y. & McCollom, T. M. Experimental investigation of single carbon compounds under hydrothermal conditions. Geochim. Cosmochim. Acta 70, 446–460 (2006). Provides important insights into the chemical equilibria and speciation of C 1 intermediates in the reaction of H 2 and CO 2 to CH 4 under conditions that simulate submarine hydrothermal vents. This study showed that formate and CO are readily generated from CO 2 and H 2 and revealed kinetic barriers to CH 4 formation.
  Article CAS Google Scholar
• Imkamp, F., Biegel, E., Jayamani, E., Buckel, W. & Müller, V. Dissection of the caffeate respiratory chain in the acetogen Acetobacterium woodii: identification of an Rnf-type NADH dehydrogenase as a potential coupling site. J. Bacteriol. 189, 8145–8153 (2007).
  Article CAS PubMed PubMed Central Google Scholar
• Edwards, K. J., Bach, W. & McColluom, T. M. Geomicrobiology in oceanography: microbe–mineral interactions at and below the seafloor. Trends Microbiol. 13, 449–456 (2005).
  Article CAS PubMed Google Scholar
• Kashefi, K., Holmes, D. E., Lovley, D. R. & Tor, J. M. in The Subseafloor Biosphere at Mid-Ocean Ridges (eds Wilcock, W. S. D., DeLong, E. F., Kelley, D. S., Baross, J. A. & Cary, S. C.) 199–212 (American Geophysical Union, Washington DC, 2004).
  Book Google Scholar
• Campbell, B. J. & Engel, A. S. The versatile e-proteobacteria: key players in sulphidic habitats. Nature Rev. Microbiol. 4, 458–468 (2006).
  Article CAS Google Scholar
• Vargas, M., Kashefi, K., Blunt-Harris, E. L. & Lovley, D. R. Microbiological evidence for Fe(III) reduction on early Earth. Nature 395, 65–67 (1998).
  Article CAS PubMed Google Scholar