Table 3.
Comparison of the relative rates of oxygen consumption (O2) during autoxidation of NQs under various conditions from Munday a and this study. Right column shows polysulfide production (SSP4 fluorescence) by SOD with NQ and H2S. a, [40]; b, addition of corresponding oxidized NQ; c, [18]. Up arrows indicate degree of increase, horizontal arrow indicates no change and down arrows indicate degree of decrease.
| Munday a | This Study | ||||||
|---|---|---|---|---|---|---|---|
| SOD (O2) | NQ(ox) (O2) b | H2S (O2) | H2S + SOD (O2) | DTT (O2) |
DTT + SOD (O2) |
H2S + SOD (SSP4) | |
| 1,4-NQ | → | ↑↑↑ | ↑↑↑ | ↑↑ | ↑↑↑ | ↓↑ | ↑ |
| 2-MNQ | ↓↓↓ | ↑↑ | ↑ | ↑ | → | ↑ | ↑↑↑ |
| Juglone | ↑ | → | ↑↑↑ | ↑↑↑ | ↑↑↑ | ↑(slight) | → |
| Menadione | ↓↓↓ | ↑↑ | ↑ | ↑ | ↑↑ | ↓ | ↑↑↑ c |
| Lawsone | ↓↓↓ | ↑ | ↑ | →(↑↓) | → | → | → |