TABLE 1.
Relative rates of triazine hydrolysis by whole cells, cell extracts, and purified triazine hydrolase
| Substrate | Relative rate of triazine hydrolysisa
|
Enzyme value
|
||
|---|---|---|---|---|
| Whole cells | Cell extract | Km (μM) | Vmax (μmol/min/mg of protein) | |
| Atrazine | 100 | 100 | 25 | 31 |
| Simazine | 95 | 119 | NDb | ND |
| Propazine | 17 | 5 | ND | ND |
| Terbuthylazine | 50 | 60 | ND | ND |
| Ametryn | 193 | 194 | 17 | 18 |
| Simetryn | 167 | 198 | ND | ND |
| Prometryn | 212 | 75 | 310 | 98 |
| Terbutryn | 123 | 32 | ND | ND |
| CEAT | ND | ND | 131 | 0.35 |
a
Given as percentages of the atrazine rate.
b
ND, not done.