This animation of the Calvin cycle is designed to show, in 3 stages, the
major events in the synthesis of sugar in the stroma of chloroplasts. For the sake of clarity all of the enzymes, except Rubisco, have been omitted and only the carbon skeletons of the intermediates are shown. The series of reactions that take place during stage 3 are rather involved and more appropriate for a 300-level course in plant biochemistry.