Table 1. Numbers of metabolites confirmed and putatively identified in cell extracts and spent media.
| Cell extracts | Spent media | |||
|---|---|---|---|---|
| Confirmed(std, MS/MS) | Putative | Confirmed(std, MS/MS) | Putative | |
| Metabolites after filteringlipids and peptides | 153 (135, 18) | 459 | 137 (119, 18) | 548 |
| 2-fold difference frominitial medium | na | na | 79 (63, 16) | 173 |
| No change from initialmedium | na | na | 58 (56, 2) | 375 |
| No clear speciesspecificity | 48 (43, 5) | 222 | 21 (18, 3) | 53 |
| Clear species specificity (>2-fold change) | 105 (92, 13) | 237 | 58 (45, 13) | 120 |
| Clear species specificity(>3-fold change) | 64 (55, 9) | 161 | 43 (32, 11) | 87 |
| Clear species specificity(> 4-fold change) | 52 (45, 7) | 129 | 39 (30, 9) | 68 |
Key: na, not applicable; std, using standards; the data on species specificity for the spent media are for the metabolites (79 confirmed, 173 putative) showing at least 2-fold differences from the initial medium.