What is the first stable product formed in the C 4 cycle?

The C 4 cycle also called the Hatch and Slack pathway. Here, the first stable product of CO 2 fixation is a 4-carbon compound, oxaloacetic acid (OAA). In C4 plants, the initial CO 2 fixation takes place in mesophyll cells of leaves and the primary CO 2 acceptor is a 3-carbon compound, phosphoenol pyruvic acid (PEP). PEP combines with CO 2 in the presence of an enzyme PEP carboxylase to form oxaloacetic acid.

Complete the following equation. 3CO 2 + 6NADPH 2 + H 2 O → __?__ + ADP + __?__

3CO 2 + 6NADPH 2 + H 2 O → 6glyceraldehyde 3-phosphate + ADP + 6NADP + In the Calvin cycle (C 3 cycle), the RuBP fixes CO 2 in the presence of an enzyme RuBisCO, to form two molecules of phosphoglyceric acid (PGA). PGA undergoes phosphorylation to form 1,3-diphosphoglyceric acid and it undergoes reduction to form glyceraldehyde 3-phosphate. By fixation of 3 molecules of CO 2 , 6 molecules of glyceraldehyde 3-phosphate are formed by using 6NADPH 2 .