Table 3. Databases used for protein identification.
| Database name | Size (number of proteins) |
| European Metagenome MetaHIT | 3,267,604 |
| 298 human intestinal microbes | 947,087 |
| Japanese Metagenome | 600,752 |
| Food database | 247,371 |
| Human database | 69,879 |
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