Fig. 1. Existing naturally existed CO2 fixation pathways. (IMAGE)
Caption
(A) CBB cycle. This cycle is closely related to the pentose phosphate pathway [26]. (B) Reductive glycine pathway (in purple and blue) [27] and Wood–Ljungdahl pathway in acetogens (in black) and methanolgens (in green) [30]. (C) DC/HB cycle. This cycle fixes 1 mol of CO2 by pyruvate synthase and 1 mol of bicarbonate by phosphoenolpyruvate (PEP) carboxylase [28]. (D) HP/HB cycle (in blue) and 3-HP cycle (in black). These cycles assimilate 2 mol of bicarbonate by acetyl-CoA/propionyl-CoA carboxylase [29]. (E) Reductive TCA cycle. This cycle fixes 2 mol of CO2 by reversing the oxidative TCA cycle [31]. The changes in the Gibbs energy calculated by eQuilibrator [183,184] are shown in blue.
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BioDesign Research
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