Figure 1

Scheme of inputs, three main phases and outputs of the Calvin-Benson cycle in cyanobacteria. The initial phase of the Calvin-Benson cycle is fixation of CO₂ into carbon skeleton - carboxylation of ribulose-1,5-bisphosphate (RuBP). The second phase describes the reduction of the 3-phosphoglycerate (PGA) which forms the glyceraldehyde phosphate and dihydroxyacetone phosphate. The final regeneration phase of the cycle involves several reactions leading to the RuBP reassembling.