Table 1.
Carbon substrates used for the 13C-fingerprinting experiments in SYK-6
| Primary carbon substrate | Primary substrate concentration, g/L | Secondary carbon source |
| Vanillin (phenyl-13C) | 0.75 | — |
| Vanillin (methoxy-13C) | 0.75 | — |
| Vanillin (aldehyde-13C) | 0.75 | — |
| Acetate (1-13C) | 1 | — |
| Acetate (1,2 -13C) | 1 | — |
| d-glucose (U-13C) | 1 | Yeast extract, 0.2 g/L |
| Xylose (1,2-13C) | 1 | Yeast extract, 0.2 g/L |
| Pyruvate (U-13C) | 1 | Malate, 1 g/L |
| Pyruvate (U-13C) | 1 | Glyoxylate, 1 g/L |
| Pyruvate (U-13C) | 1 | Oxaloacetate, 1g/L |
| Pyruvate (unlabeled) | 1 | Formate (13C), 1 g/L |
| Vanillin (unlabeled) | 0.75 | Formate (13C), 0.75 g/L |
| Vanillin (phenyl-13C) | 0.75 | Methanol, 0.75 g/L |
| Vanillin (phenyl-13C) | 0.75 | Glyoxylate, 0.75 g/L |