Table 1.
Assignments for the 1H and 13C DEPT-135 NMR spectra of the repeating-unit region of L. gasseri JCM 1131T LTA
| Residue | Proton (1H) | δ (ppm) | Intensitya | Carbon (13C) | δ (ppm) |
|---|---|---|---|---|---|
| Unsubstituted glycerol | H-1, 3 | 3.90 | 1.38H (2H × 0.69) | C-1, 3 | 68.98 |
| 3.96 | 1.38H (2H × 0.69) | ||||
| H-2 | 4.05 | 0.69H (1H × 0.69) | C-2 | 72.32 | |
| Alanine-substituted glycerol | H-1, 3 | 4.11 | 1.24H (4H × 0.31) | C-1, 3 | 66.43 |
| H-2 | 5.40 | 0.31H (1H × 0.31) | C-2 | 77.01 | |
| Substituted alanine | C-1 | 172.84b | |||
| H-2 | 4.29 | 0.31H (1H × 0.31) | C-2 | 51.70 | |
| H-3 | 1.63 | 0.93H (3H × 0.31) | C-3 | 18.08 |
a
The intensity was adjusted by taking a proton of one repeating unit as 1.
b
This peak was detected by heteronuclear multiple-bond correlation.