Talk:Sulfur-reducing bacteria

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Some bacteria can use both elemental sulfur and sulfate as a source of energy.

How can sulfate SO₄^2- be used as energy source? You can't oxidize it further, as far as I know. For example, in anammox, Brocadia uses NO₂^- as electron donor - just my association. It (sulfate) can be used as e^- acceptor, as in sulfate reducing bacteria, though. --romunov 18:12, 15 January 2007 (UTC)