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Calvin cycle. The Calvin cycle (also known as Calvin-Benson cycle) is a series of biochemical reactions taking place in the chloroplasts of photosynthetic organisms. It was discovered by Melvin Calvin and Andy Benson at the University of California, Berkeley. It is one of the light-independent reactions and occurs in the stroma.
The second set of reactions goes by a number of names--light independent reactions, dark reactions, or the Calvin cycle. Basically, this is where the chemical energy (ATP and electrons) generated in the light reactions is used to glue carbon atoms together to make glucose.