Table 3. Solvent Isotope Effect at 30 °Ca.
enzyme form | D2Okcat | D2O(kcat/Km) |
---|---|---|
WT SLO-1 | 1.20 (0.10) | 1.52 (0.31) |
553A/754A | 1.46 (0.11) | 1.27 (0.27) |
546A/754A | 1.04 (0.12) | 0.91 (0.28) |
H2O buffer: 0.1 M borate (pH 9.0) in H2O. D2O buffer: 0.1 M borate (pD 9.0) in D2O (with a pH meter reading of 8.6).