Question on Calvin Cycle

[junbumkim]

I am abit perplexed about inputs and outputs of calvin cycle.

A book says that it takes 6 complete calvin cycles with 6 molecules CO2 to produce 12 PGAL of which 10 are used in forming 6 RBPs and 1 glucose.

However, in the diagram, they show 3 molecules of CO2 as an input.

If 3 CO2 were input to one cycle of Calvin cycle, then 6 Calvin cycle would consume 18 molecules of CO2, wouldn't it?

Can anyone explain this please?

[Darby]

Try these:

http://www.geosciences.unl.edu/~dbennet ... schema.gif

http://www.humboldt.edu/~rap1/BiochSupp ... CalCyc.gif