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{{short description|Paleoproterozoic surge in atmospheric oxygen}} ...of the oceans, but is absorbed by land surfaces. No significant change in oxygen level. ...

...e family of [[lyase]]s, specifically the hydro-lyases, which cleave carbon-oxygen bonds. The systematic name of this [[enzyme]] is '''2-phospho-D-glycerate h ...he resulting negative charge is stabilized by resonance to the carboxylate oxygen and by the magnesium ion cofactors. Following the creation of the carbanion ...