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Urease activity of H. pylori wild-type, urease deletion, and site-directed mutant strains
| Strain | Urease activity (μmol/min/mg)a |
|---|---|
| 43504 (wild type) | 4.65 ± 0.96a |
| ΔureAB strain | 0.06 ± 0.01 |
| ureBH136A strain | 0.07 ± 0.02 |
| ureBH138A strain | 0.07 ± 0.01 |
| ureBK219A strain | 0.08 ± 0.01 |
Urease activity expressed in micromoles of NH3 produced per minute per milligram of total protein. Results shown are the means ± SDs from 3 to 8 independent experiments with assays performed in triplicate.
