Table 2. Assignment of 1H- nuclear magnetic resonance chemical shifts of fraction EGCI 1-1, 1-2, and 1-3 separated from EGC (EGCI-1)
Reporter group | Residue | Chemical shifts, δ (coupling constants, Hz) |
EGCI 1-1 | EGCI 1-2 | EGCI 1-3 |
H-1 | Glc α | 5.222 (4.0) | 5.225 (3.4) | 5.227 (3.4) |
Glc β | 4.663 (8.0) | 4.669 (8.0) | 4.671 (8.0) |
Galβ4 | 4.530 (8.0) | 4.427 (8.0) | 4.431 (7.9) |
H-3ax | Neu5Ac(α2-3) | 1.800 (12.01), −12.02)) | - | - |
Neu5Ac(α2-6) | - | 1.743 (12.61), −12.02)) | - |
Neu5Gc(α2-6) | - | | 1.762 (12.61), −12.02)) |
H-3eq | Neu5Ac(α2-3) | 2.756 (4.63)) | - | - |
Neu5Ac(α2-6) | - | 2.711 (4.63)) | - |
Neu5Gc(α2-6) | - | - | 2.731 (4.63)) |
NAc | Neu5Ac(α2-3) | 2.030 | - | - |
Neu5Ac(α2-6) | - | 2.028 | - |
NGc | Neu5Gc(α2-6) | - | - | 4.118 |
J3ax, 4,
J3ax, 3eq,
J3eq, 4.
EGC, Etawah Grade colostrum.