Table S2.
13C isotope composition of meteoritic sugar acids and glycerol
| Compound | 13C (‰) | Meteorite |
| Glyceric acid (d+l) | 60 | M30 |
| 2-Methylglyceric acid (d+l) | 82 | M30 |
| Erythro-2,3-dihydroxybutyric acid (d+l) | 18 | M56 |
| Threonic acid (d) | 10* | M53 |
| Erythonic acid (d+l) | 10* | M53 |
| Glycerol | 5 | G |
G, GRA 95229; M, Murchison. Glyceric acid, 2-methylglyceric acid, and erythro-2,3-dihydroxybutyric acid were TMS derivatives; threonic and erythronic were i-Pr/TFA derivatives (see Materials and Methods).
*
Must be repeated with larger meteorite extracts and method modification.