| H218O label | RSO2H (cysteine sulfinic acid) | RSO3H (cysteine sulfonic acid) | RSSO3H (cysteine-S-sulfonate) | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Ar | Ar/O2 | COST He/O2 | Ar | Ar/O2 | COST He/O2 | Ar | Ar/O2 | COST He/O2 | |
| 16O/% | 65.6 | 69.4 | 79.0 | 65.0 | 78.5 | 83.8 | 11.9 | 9.7 | 8.9 |
| 18O/% | 34.4 | 30.6 | 21.0 | 34.9 | 21.7 | 16.2 | 87.9 | 90.3 | 91.1 |
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