TABLE 4.
Proposed structures for the various molecular ions observed during MALDI-TOF MS analysis of the HF-PS from B. cereus ATCC 14579
| Repeat units | Proposed structure | Observed [M + Na]+ ion |
|---|---|---|
| R1a + 1 | [HexNAc3Glc]-HexNAc | 1015.3 |
| R1 + 2 | [HexNAc3Glc]-HexNAc2 | 1218.4 |
| R2 + 0 | [HexNAc3Glc]2 | 1583.5 |
| R2 + 1 | [HexNAc3Glc]-HexNAc | 1786.5 |
| R2 + 2 | [HexNAc3Glc]-HexNAc2 | 1989.4 |
| R3 + 0 | [HexNAc3Glc]3 | 2354.5 |
a
Rn, the number of repeating units. The number following the repeating units indicates the number of added HexNAc residues.