Why do methanogens produce methane?

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    • #12487
      maccha
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      Doesn’t this just cost them energy and they excrete it? What’s the motivation?

      Also how do chemolithotrophs get NADH?

    • #96121
      MrMistery
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      nope, the reaction CO2 + 4 H2 -> CH4 + 2H2O has a deltaG of -170. http://www.fao.org/docrep/W7241E/w7241e0f.htm

      On your second question, I would say it depends on the exact organism and the pathway they use

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