Where in the chloroplast are the enzymes that catalyze the Calvin cycle found?
The Calvin cycle takes place in the stroma of the chloroplast.
Carbon dioxide enters the stroma of the chloroplast to combine with
the five-carbon compound called ribulose1, 5-Biphosphate to form
two molecules of a three-carbon compound called 3-Phosphoglyceric
acid. This reaction is catalyzed by an enzyme called Ribulose
bi-phosphate Carboxylase.