Table 1.
Position b | 1H Chemical Shift (ppm) | 13C Chemical Shift (ppm) |
---|---|---|
A1 | 5.58 | 100.30 |
A2 | 3.24 | 60.77 |
A3 | 3.65 | 72.48 |
A4 | 3.65 | 81.11 |
A5 | 3.75 | 73.61 |
A6 | 3.84/3.79 | 62.65 |
G1 | 4.52 | 105.33 |
G2 | 3.38 | 75.83 |
G3 | 3.80 | 79.96 |
G4 | 3.89 | 78.70 |
G5 | 3.82 | 79.06 |
G6 | - | 176.85 |
Chemical shifts are given in ppm, 1H chemical shifts is measured indirectly with reference to DSS in D2O at 25°C. 13C is measured indirectly with reference to 1H using a chemical shift ratio of 0.25144.
A represents glucosamine and G represents glucuronic acid. The numerical suffix corresponds to the carbon position starting with the anomeric carbon as 1.