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Summary of kinetic experiments for the additional [13C] amino acids, [13C] amino acid derivatives, and [13C] organic acids by HRAM LC/MS
| [13Cx] metabolite | Rise to maximum (h) | Decay to baseline (h) |
|---|---|---|
| [13C2]acetylcholine | <1 | 6 |
| [13C1]GABA (minor) | 1–6 | >12 |
| [13C2]GABA | 1 | >12 |
| [13C1]Ser | 1 | >12 |
| [13C2]Ser (minor) | 1 | >6 |
| [13C1]2-HG (minor) | 1-6 | >6 |
| [13C2]2-HG | 1 | >6 |
| [13C1]Lac (minor) | 1–6 | >6 |
| [13C2]Lac | 1 | >6 |
| [13C1]Pyr (minor) | 1–6 | >6 |
| [13C2]Pyr | 1 | >6 |
| [13C1] uric acid | 6 | >24 |
