The Calvin cycle is a set of chemical reactions that take place in the chloroplast during Photosynthesis. It is a light- independent reaction. It requires:
- RuBP, a 5C molecule
- Rubisco, an enzyme used to catalyse the C fixation and
The following are the steps taking place in Calvin cycle:
- Carbon fixation: CO2 joins with RuBP with the help of enzyme Rubisco to form two 3C PGA molecules.
- Reduction: The 2 PGA molecules are converted to Phosphoglycerates and then to 6 PGAL molecules by using Phosphorus from ATP and Hydrogen from NADPH.
- Regeneration of RuBP: Out of the 6 PGAL molecules, 1 is used in the production of Sugar molecules (like Glucose) while the other 5 are converted back to RuBP using ATP molecules.
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