RUBP is Ribulose 1,5-BisPhosphate
G3P or PGAL is Glyceraldehyde 3-Phosphate
DHAP is DiHydroxyAcetone Phosphate
|
1.
CO2 + RUBP ——>
2 molecules 3-PhosphoGlycerate
2.
3-PhosphoGlycerate + ATP, then
NADPH + H+ ——>
G3P + NADP+ + ADP + Pi
3.
Some G3P ——> DHAP
4.
Some G3P + DHAP ——>
Fructose BisPhosphate ——>
Fructose 6-Phosphate + Pi
5.
Some Fructose 6-Phosphate ——>
Glucose 6-Phosphate ——>
Glucose + Pi, or else
Glucose 6-Phosphate ——>
Starch + Pi
6.
Rest of Fructose 6-Phosphate + G3P ——>
Xylulose-5-Phosphate + Erythrose-4-Phosphate
7.
Erythrose-4-Phosphate + DHAP ——>
Sedoheptulose BisPhosphate ——>
Sedoheptulose 7-phosphate + Pi
8.
Sedoheptulose 7-Phosphate + G3P ——>
Xylulose-5-Phosphate + Ribose-5-Phosphate
9.
Ribose-5-Phosphate
——> Ribulose-5-Phosphate
10.
Xylulose-5-Phosphate (from reactions 6 & 8)
——> Ribulose-5-Phosphate
11.
Ribulose-5-Phosphate + ATP ——>
RUBP + ADP
Overall net reaction:
6 CO2 + 18 ATP + 12 NADPH + 12 H+
+ 12 H2O ——>
C6H12O6 (glucose) + 18 Pi
+ 18 ADP + 12 NADP+
|