| Enzyme activity, mU/mg protein | Yeast strain | |
| ΔPPN1 | PPN1-overexpressing strain | |
| Polyphosphatase | 88 ± 9.0 | 3640 ± 10 |
| Polyphosphatase, 10 mg/l heparin | 88 ± 7.0 | 420 ± 30 |
| dATP phosphohydrolase | 30 ± 2.8 | 370 ± 62 |
| dATP phosphohydrolase, 10 mg/l heparin | 26 ± 1.0 | 55 ± 4.0 |