Table 2.
Identification of GBR metabolites contributing to the separation of the sample groups based on PLS-DA score plot for UPLC-Q-TOF MS analysis.
| RT a (min) | Compound | Exact Mass | MS Fragments | VIP b | p-Value c |
|---|---|---|---|---|---|
| (M + H) | |||||
| 1.65 | tryptophan | 205.0821 | 188 | 0.47 | 7.32 × 10−1 |
| 5.37 | PC (16:0/2:0) | 538.3476 | 184, 440 | 0.99 | 2.15 × 10−6 |
| 5.79 | phytosphingosine | 318.2986 | 282 | 1.24 | 1.43 × 10−12 |
| 6.94 | LPC (16:0) | 496.3404 | 184, 104 | 1.35 | 2.15 × 10−13 |
| 6.56 | LPE (18:2) | 478.2904 | 337, 460 | 1.37 | 4.64 × 10−19 |
| 7.12 | LPC (18:1) | 522.3558 | 184, 104 | 1.43 | 5.43 × 10−17 |
| 6.13 | LPC (14:0) | 468.3089 | 184, 104 | 1.44 | 8.35 × 10−14 |
| 5.02 | palmitic acid hydrazide | 271.2731 | 254 | 1.47 | 3.92 × 10−28 |
| 6.60 | LPC (18:2) | 520.3405 | 184, 104 | 1.50 | 1.22 × 10−17 |
a RT, retention time; b VIP, variable importance in the projection; c p-values were analyzed by Duncan’s test. PC phosphatidylcholine; LPC: lysophosphatidylcholine; LPE: lysophosphatidylethanolamine.