Table 3.
EC50 value, Ki value, Vmax value, and mode of xanthine oxidase inhibition by extracts from leaves of white beetroot (SK), beetroot (CC), white chard (BL), and red chard (LC) (n = 9).
| Plant | Mode of Inhibition | EC50 [mg FW/mL] | Ki [mg FW/mL] | Vmax [ΔAU/min] |
|---|---|---|---|---|
| White beetroot | uncompetitive | 81.04 ± 2.22 d | 24.62 ± 0.14 d | 0.42 ± 0.01 c |
| Red beetroot | noncompetitive | 205.09 ± 4.58 a | 1020.48 ± 13.58 a | 1.5 ± 0.02 a |
| White chard | noncompetitive | 147.28 ± 5.32 b | 229.71 ± 8.23 b | 1.11 ± 0.4 b |
| Red chard | uncompetitive | 105.32 ± 7.41 c | 39.156 ± 1.54 c | 0.49 ± 0.01 c |
* The values are expressed as the mean ± SD; means with different letter superscripts (a–d) in the columns are significantly different (α = 0.05).