Table 1.
Assignment of the fragment ions originating from m/z 1019.006 and m/z 1018.002 corresponding to the GalNAc-GD1(d18:1/18:0) and GalNAc-GD1(d18:1/18:1) (denoted by asterisk *) species isolated from the CSF sample and fragmented by (-) nanoESI IMS CID MS/MS.
| m/z | Charge State | Type of Fragment Ion |
|---|---|---|
| 161.032 | 1- | Y4β/Y3/B2α or Y2/Y1 or Y1/Y0 |
| 179.043 | 1- | Y4β/Z3/B2α or Y2/Z1 or Y1/Z0 |
| 202.064 | 1- | B1β or Y3/Y2 |
| 220.072 | 1- | C1β or Y3/Z2 |
| 281.243 | 1- | U* |
| 283.262 | 1- | U |
| 290.079 | 1- | B1α |
| 308.099 | 1- | C1α |
| 364.068 | 1- | B3/ B2α |
| 386.983 | 1- | 2,4X0/U |
| 458.569 | 2- | 1,5A3 |
| 539.592 | 1- | 1,5A4/B2α |
| 546.541 | 1- | Z0 |
| 552.594 | 1- | B3/B1α/2,5A1β |
| 562.522 | 1- | Y0* |
| 564.533 | 1- | Y0 |
| 567.113 | 1- | B4/B2α |
| 673.244 | 1- | C3/B1α or Y4β/B1α/Z2 |
| 708.496 | 1- | Z1 |
| 724.578 | 1- | Y1* |
| 726.587 | 1- | Y1 |
| 858.289 | 1- | B4/B1α |
| 873.463 | 2- | Y5α |
| 876.308 | 1- | C4/B1α |
| 888.632 | 1- | Y2 |
| 895.480 | 2- | Y4β/CH3CHO |
| 907.339 | 2- | Z4β* |
| 908.365 | 2- | Z4β |
| 916.466 | 2- | Y4β* |
| 917.475 | 2- | Y4β |
| 931.460 | 2- | 3,5A1α |
| 995.972 | 2- | M/*CH3CHO |
| 996.996 | 2- | M/CH3CHO |
| 1018.002 | 2- | [M* − 2H]2- |
| 1019.006 | 2- | [M − 2H]2- |
| 1038.368 | 1- | C5/B1α |
| 1064.376 | 1- | C4/2,5A1β |
| 1089.707 | 1- | Y3* |
| 1091.716 | 1- | Y3 |
| 1253.750 | 1- | Y4β/B2α |
| 1454.748 | 1- | Y4α* |
| 1456.855 | 1- | Y4α |
| 1526.850 | 1- | Y4β/C1α |
| 1542.848 | 1- | Y4β*/B1α |
| 1544.868 | 1- | Y4β/B1α |
| 1745.889 | 1- | Y5α* |
| 1747.945 | 1- | Y5α |