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Change in pH of TSB and PBS in presence of glutathione (GSH).
| GSH concentration (mM) | pH | |
| Tryptone soy broth (TSB) | 0 | 7.18 ± 0.08 |
| 10 | 6.45 ± 0.1 | |
| 20 | 5.59 ± 0.11 | |
| 30 | 4.77 ± 0.05 | |
| Phosphate buffer saline (PBS) | 0 | 7.41 ± 0.03 |
| 10 | 5.51 ± 0.09 | |
| 20 | 3.89 ± 0.14 | |
| 30 | 3.21 ± 0.16 |
