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Accurate masses of glycan oxonium and glycan-related ion and most plausible empirical formula
MS/MS spectrum of the glycopeptide MTSAFTISGIASSTK was used, and mass spectral calibration was accurate to 1.3 ppm.
| Observed mass | Plausible formula | Predicted mass |
|---|---|---|
| 377.1539a | C15H25N2O9 | 377.15545 |
| 317.1332a | C13H21N2O7 | 317.13433 |
| 203.0789b | C8H13NO5 | 203.07824 |
| 162.0521b | C6H10O5 | 162.05274 |
a Glycan oxonium ion.
b Observed mass difference from neutral loss of sugar.
