Table 2.
MS/MS peaks assignments for the peptide DQCIVDDITYNVNDTFHK from human fibronectin. Corresponding MS/MS spectra are shown in Fig. 4(a) (glycosylated peptide, m/z 3819.582) and the expanded section below m/z 2197 in Fig. 5
| Residue | b (calc.), u. | b (meas.) u. | b+83 | b+203 | y (calc.), u. | y (meas.), u. | y+83 | y+203 |
|---|---|---|---|---|---|---|---|---|
| D | 1 116.035 | — | — | — | 18 2196.987 | 2196.991 | 2280.021 | 2400.057 |
| Q | 2 244.093 | 244.094 | — | — | 17 2081.960 | 2081.959 | — | — |
| C | 3 404.124 | 404.127 | — | — | 16 1953.902 | 1953.891 | — | — |
| I | 4 517.208 | 517.205 | — | — | 15 1793.871 | — | — | — |
| V | 5 616.276 | 616.284 | — | — | 14 1680.787 | 1680.787 | — | 1883.889 |
| D | 6 731.303 | 731.304 | — | — | 13 1581.719 | 1581.700 | — | 1784.770 |
| D | 7 846.330 | 846.344 | — | — | 12 1466.692 | 1466.689 | 1549.721 | 1669.777 |
| I | 8 959.414 | 959.418 | — | — | 11 1351.665 | 1351.666 | 1434.696 | 1554.747 |
| T | 9 1060.462 | 1060.464 | — | — | 10 1238.581 | 1238.575 | 1321.607 | 1441.652 |
| Y | 10 1223.526 | 1223.545 | — | — | 9 1137.533 | 1137.525 | 1220.579 | 1340.61 |
| N | 11 1337.568 | 1337.556 | — | — | 8 974.470 | 974.474 | 1057.495 | 1177.548 |
| V | 12 1436.637 | 1436.619 | — | 7 860.427 | 860.419 | — | 1063.509 | |
| N | 13 1550.680 | — | 1633.737 | 1753.78 | 6 761.358 | 761.364 | 844.393 | 964.431 |
| D | 14 1665.707 | 1665.742 | 1748.749 | 1868.797 | 5 647.315 | 647.322 | — | — |
| T | 15 1766.755 | 1766.775 | — | 1969.9 | 4 532.289 | 532.289 | — | — |
| F | 16 1913.823 | 1913.831 | — | — | 3 431.241 | 431.234 | — | — |
| H | 17 2050.882 | 2050.867 | 2133.942 | 2254.001 | 2 284.172 | 284.165 | — | — |
| K | 18 2178.977 | — | — | — | 1 147.113 | — | — | — |