title: Two kinds of lithotrophs missing in nature.
abstract: Two groups of lithotrophic bacteria, the existence of which may be expected on evolutionary and thermodynamical grounds, have not yet been detected: (A) photosynthetic, anaerobic, ammonia bacteria, analogous to coloured sulphur bacteria, and (B) chemosynthetic bacteria that oxidize ammonia to nitrogen with O2 or nitrate as oxidant.
mesh_terms: D000641:Ammonia / Q000378:metabolism; D000693:Anaerobiosis; D001419:Bacteria / Q000378:metabolism*; D005075:Biological Evolution; D004734:Energy Metabolism; D008954:Models, Biological
chemical_list: D000641:Ammonia