Table 1.
Kinetic parameters of the K. brevis EH with various substrates and inhibitors
| Entry | Substrate | Km (μM) | kcat (sec−1) | kcat (sec−1)/Km (M) | IC50 (mM) |
|---|---|---|---|---|---|
| 1 | Probe 5a (R = Ph) | 13.6 | 7.81E-4 | 57.4 | - |
| 2 | Probe 5b (R = Et) | 161 | 4.46E-3 | 27.7 | - |
| 3 | (R) styrene oxide | 6240 | 9.01E-1 | 144 | - |
| 4 | (S) styrene oxide | 6430 | 8.32E-1 | 129 | - |
| 5 | (R/S) styrene oxide | 6570 | 8.58E-1 | 131 | - |
| 6 | α-methylstyrene oxide | 5310 | 3.31E-1 | 62.3 | - |
| 7 | (R) 1-butane oxide | 25,800 | 6.15 | 238 | - |
| 8 | (R/S) 1-butane oxide | 22,200 | 5.36 | 241 | - |
| 9 | 1,2,7,8-diepoxyoctane | 4,800 | 7.12 | 1483 | - |
| 10 | cis-β-methylstyrene oxide | - | - | - | 3.05 |
| 11 | trans-β-methylstyrene oxide- | - | - | - | 14.28 |
| 12 | β-dimethylstyrene oxide | - | - | - | 6.99 |
| 13 | cis-2,3-epoxybutane | - | - | - | - |
| 14 | 2,3-dimethyl-2,3-epoxybutane | - | - | - | −3 |