Na [[Chemosynthesisquimiosíntese]] isdestas carbonbacterias fixationprodúcese drivenunha byfixación thedo oxidationcarbono ofimpulsada inorganicpola substancesoxidación de substancias inorgánicas (e.g.por exemplo, gas [[hydrogenhidróxeno]] gas orou [[hydrogensulfuro sulfidede hidróxeno]]). As Sulfur-bacterias andquimiosintéticas hydrogenque oxidan hidróxeno-oxidizingxofre poden fixar o carbono por bacteriamedio oftendo useciclo thede Calvin cycleou ordo theciclo reductivedo citricácido acidcítrico cycleredutivo.<ref>{{cite book|title=Encyclopedia of Microbiology|url=http://books.google.com/books?id=rLhdW5YzuO4C&pg=RA2-PA83&dq=chemosynthesis+carbon+fixation&hl=en&sa=X&ei=ykpYUti4Kono8gTIvoCYAQ&ved=0CFUQ6AEwBw#v=onepage&q=chemosynthesis%20carbon%20fixation&f=false|publisher=Academic Press|year=2009|isbn=9780123739445|pages=83–84}}</ref>
