Table 6.
Effect of different aging treatments on metabolomics profile of pork loins (M. Longissimus lumborum) aged for 21 days (p-value < 0.05 and FDR < 0.05).
| Mass | RT | HMDB ID | Name | Highest Abundance | WA | DA | UDA |
|---|---|---|---|---|---|---|---|
| Protein-derived | |||||||
| 155.0350 | 0.69 | HMDB0000177 | l-Histidine | DA/UDA | 4.43 b | 4.85 a | 4.73 a |
| 226.0959 | 5.76 | HMDB0001904 | 3-Nitrotyrosine | DA/UDA | 5.20 b | 5.37 a | 5.32 a |
| 157.1467 | 19.41 | HMDB0000459 | 3-Methylcrotonylglycine | UDA/DA | 5.10 b | 5.17 a | 5.18 a |
| 165.1162 | 4.41 | HMDB0000159 | l-Phenylalanine | UDA | 6.20 b | 6.21 b | 6.31 a |
| 129.0425 | 0.88 | HMDB0000267 | Pyroglutamic acid | WA | 5.73 a | 5.63 b | 5.61 b |
| 145.1101 | 0.79 | HMDB0003464 | 4-Guanidinobutanoic acid | WA | 6.18 a | 6.00 b | 6.01 b |
| 181.1018 | 2.31 | HMDB0000158 | l-Tyrosine | WA/DA | 6.07 a | 6.02 a | 5.96 b |
| Carbohydrate-derived | |||||||
| 260.1372 | 4.86 | HMDB0000124 | Fructose 6-phosphate | DA/UDA | 5.11 b | 5.21 a | 5.18 a |
| 164.0475 | 2.31 | HMDB0000174 | l-Fucose | WA | 7.34 a | 7.28 b | 7.23 c |
| Nucleotide-derived | |||||||
| 128.1316 | 0.52 | HMDB0000079 | Dihydrothymine | DA/UDA | 6.41 b | 6.46 a | 6.45 a |
| 242.1268 | 5.40 | HMDB0000273 | Thymidine | DA/UDA | 5.68 b | 5.85 a | 5.83 a |
| 329.1949 | 7.60 | HMDB0000058 | Cyclic AMP | DA/UDA | 5.49 b | 5.68 a | 5.66 a |
| 348.0591 | 1.70 | HMDB0000175 | Inosine monophosphate | DA/UDA | 5.23 b | 6.17 a | 6.06 a |
| 136.0387 | 4.12 | HMDB0000157 | Hypoxanthine | UDA/DA | 7.45 b | 7.53 a | 7.58 a |
| 243.1835 | 18.87 | HMDB0000089 | Cytidine | UDA/DA | 5.55 b | 5.61 a | 5.62 a |
| 79.0424 | 1.58 | HMDB0000926 | Pyridine | WA | 6.00 a | 5.78 b | 5.78 b |
| 135.0665 | 1.65 | HMDB0000034 | Adenine | WA | 5.41 a | 5.20 b | 5.15 b |
| 252.1108 | 4.17 | HMDB0000071 | Deoxyinosine | WA | 5.17 a | 4.74 b | 4.63 b |
| Others | |||||||
| 85.0892 | 4.00 | HMDB0002039 | 2-Pyrrolidinone | DA/UDA | 6.11 b | 6.24 a | 6.20 a |
| 212.0800 | 1.05 | HMDB0014814 | Benzyl benzoate | DA | 4.88 b | 5.00 a | 4.94 a,b |
| 132.0247 | 1.28 | HMDB0001844 | Methylsuccinic acid | WA | 7.14 a | 7.05 b | 7.02 b |
| 84.0213 | 0.68 | HMDB0001184 | Methyl propenyl ketone | WA | 4.87 a | 4.72 b | 4.75 b |
| 110.9992 | 0.51 | HMDB0002434 | Hydroquinone | WA/DA | 6.16 a | 6.15 a | 6.13 b |
| 122.0371 | 2.31 | HMDB0001406 | Niacinamide (vitb3) | WA/DA | 6.17 a | 6.12 a | 6.07 b |
| 174.1133 | 0.63 | HMDB0003070 | Shikimic acid | WA | 5.42 a | 5.31 b | 5.26 b |
| 226.1075 | 0.65 | HMDB0000245 | Porphobilinogen | WA | 6.92 a | 6.88 b | 6.85 b |
| 271.1644 | 1.05 | HMDB0003263 | Pelargonidin | WA/DA | 5.15 a | 5.12 a | 4.92 b |
a–c Different superscript letters indicated a significant difference between the different aging methods (p < 0.05). Different aging treatments: wet-aging (WA), conventional dry-aging (DA), and UV-light dry-aging (UDA).