Table 2.
Synthesis of nucleobases and analogs by irradiation of FA with minerals
| Product* | Covellite | Chalcopyrite | Montmorillonite | Troilite | Magnetite |
| Uracil (1) | — | — | — | — | — |
| Cytosine (2) | — | 1.20 | — | 0.20 | — |
| Thymine (3) | — | — | — | — | — |
| Adenine (4) | — | — | — | — | 0.98 |
| Guanine (5) | — | — | 0.61 | 0.58 | 2.32 |
| Purine (6) | — | — | — | — | — |
| Isocytosine (7) | — | 2.18 | — | 0.13 | — |
| Hypoxanthine (8) | 0.07 | — | 1.13 | 0.72 | — |
| 2,6-Diaminopurine (9) | — | — | — | — | 1.67 |
| Orotic acid (10) | — | — | 0.40 | 1.09 | 0.40 |
| 4(3H)pyrimidone (12) | 0.63 | 3.0 | — | 0.41 | — |
| AHMN (14) | — | 0.11 | 0.08 | 0.12 | 2.31 |
| DAMN (15) | — | — | — | — | 0.36 |
| 4-AIM (16) | — | 0.13 | — | — | 2.31 |
*
The data are the mean values of three experiments with SD less than 0.1%. Products are given in micrograms (per 1-mL FA reactions). See Nucleosides, Nucleobases, and Sugars.