This is the second stage of the Calvin Cycle.
Formation of triose phosphate
The formation of triose phosphate, or TP, heavily relies on the light-dependent reaction.
- The hydrolysis of ATP (from the light-dependent reaction) provides energy to reduce the 3-carbon compound, GP, to a different 3-carbon compound called triose phosphate (TP).
- This reaction requires H+ ions, which come from reduced NADP (also from the light-dependent reaction).
- Reduced NADP is recycled to NADP.
- Some triose phosphate is then converted into useful organic compounds like glucose, whereas some continues in the Calvin cycle to regenerate RuBP.