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Kinetic parameters for DcpG ligand-dependent PDE activity at 25 °C (mean ± SD of at least three independent experiments)
| Ligation state | kcat (min−1) | KM (µM) | kcat /KM (M−1/min−1) |
| Fe(II) | 0.22 ± 0.01 | 8.35 ± 4.78 | 25,746 |
| Fe(II)-O2 | 0.54 ± 0.08 | 11.94 ± 4.65 | 44,848 |
| Fe(II)-NO | 0.27 ± 0.04 | 6.66 ± 2.09 | 40,943 |
| Fe(II)-CO | 0.17 ± 0.01 | 7.82 ± 2.96 | 21,987 |
