text: how does the electron transport chain work during the calvin cycle? there are only 3 points where atp are produced, right? i think there's onl two because during the calbin cycle, atp is produced after the 3-phosphoglycerate and after phase 3 (which is regeneration of the co2 acceptor) ... thats according to a diagram in my bio book. only 3 atp are produced each time making 6 total.