Linked from
The 24 pages that link to Calvin cycle, each with the reason it gives.
ChemosynthesisRelated: Many chemosynthetic bacteria use this pathway to fix carbon.
CAM photosynthesisRelated: It fixes the carbon dioxide released from stored acids during the day.
KetoseRelated: The cycle uses the ketose ribulose 1,5-bisphosphate to capture carbon dioxide.
GlyceraldehydeRelated: The cycle produces triose phosphates, including glyceraldehyde 3-phosphate.
ErythroseRelated: A Calvin-cycle intermediate can be rearranged into erythrose 4-phosphate.