CAM photosynthesis

[CANgnome]

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So, Cliff's AP biology says that Malic Acid -> Oxaloacetate during the day needs 1 ATP, but internet resources say it needs 1 NADH. So, which is it? I am more inclined to believe that it is NADH.

 

[dentalWorks]

going from:
CO2 + PEP ------(needs 1 ATP)----> Oxaloacetate

then from:
Oxaloacetate -------(needs 1 NADH)-----> malate


Just remember that the ATP is not directly used in the formation of oxaloacetate. But rather it is used by a kinase to "activate" PEP carboxylase (the enzyme responsible for the formation of oxaloacetate)

 

[whathashizzyDDS]

going from:
CO2 + PEP ------(needs 1 ATP)----> Oxaloacetate

then from:
Oxaloacetate -------(needs 1 NADH)-----> malate


Just remember that the ATP is not directly used in the formation of oxaloacetate. But rather it is used by a kinase to "activate" PEP carboxylase (the enzyme responsible for the formation of oxaloacetate)

Do you know what the difference between this oxaloacetate and the one in krebbbs cycle?