Table 2. Rate constants for cytochrome c reduction by various sugars.
| Sugar | Rate Constanta (mM-0.5 min-1) |
|---|---|
| R5P | 5.0 × 10-2 |
| Ribose | 1.4 × 10-2 |
| Ribose and Pi | 1.6 × 10-2 |
| Glucose 6-Phosphate | 0.65 × 10-2 |
| Fructose 6-Phosphate | 1.6 × 10-2 |
| Glucose | 0.44 × 10-2 |
| Glucose and Pi | 0.37 × 10-2 |
| Arabinose 5-Phosphate | 3.7 × 10-2 |
| 2-Deoxyribose 5-phosphate | 0 |
| R5P with ribose 5-phosphate isomerase (12 kU/mL)b | 25.0 × 10-2 |
a
All rate constants calculated as first order in respect to cytochrome c concentration and half order in respect to sugar concentration.
b
Rate constant calculated based on an equilibrium amount of 30% Ru5P (in comparison to R5P