Table 2.
Summary equations describing conversion of sucrose to prephenate
| No.* | Summary equation | ||
| S.1 | Sucrose + ADP + 2 NAD+ + 3 NADP+ + 2 PPi | → | prephenate + ATP + 2 NADH + 3 NADPH + 3 Pi + H2O + 2 CO2 |
| S.2 | Sucrose + 2 NAD+ + 3 NADP+ + PPi | → | prephenate + 2 NADH + 3 NADPH + 2 Pi + H2O + 2 CO2 |
| S.3 | Sucrose + ATP + 2 NAD+ + 3 NADP+ + PPi | → | prephenate + ADP + 2 NADH + 3 NADPH + 3 Pi + 2 CO2 |
| S.4 | Sucrose + 2 ATP + 2 NAD+ + 3 NADP+ | → | prephenate + 2 ADP + 2 NADH + 3 NADPH + 2 Pi + 2 CO2 |
Figure 1 shows complete reaction sequences. Summary equations are listed in order from most (S.1) to least (S.4) efficient. Equation (S.1) represents the reaction set including sucrose cleavage by sucrose synthase (EC 2.4.1.13), and fructose 6‐P phosphorylation by PPi‐fructose‐6‐P 1‐phosphotransferase (EC 2.7.1.90). Equation (S.2) represents the reaction set including sucrose cleavage by sucrose synthase, and fructose 6‐P phosphorylation by 6‐phosphofructokinase (EC 2.7.1.11). Equation (S.3) represents the reaction set including sucrose cleavage by invertase (β‐fructofuranosidase; EC 3.2.1.26), and fructose 6‐P phosphorylation by PPi‐fructose‐6‐P 1‐phosphotransferase. Equation (S.4) represents the reaction set including sucrose cleavage by invertase, and fructose 6‐P phosphorylation by 6‐phosphofructokinase.
* Summary equation numbers (No.) are used elsewhere in analysis.