Table 1. Kinetic Parameters Associated with the Aptananozymes I–V and Control Systemsa.
aptananozyme | Vmax (μM min–1) | KM (μM) | kcat (10–3 s–1) | kcat/KM (s–1 M–1) |
---|---|---|---|---|
IV | 2.01 ± 0.1 | 181 ± 32 | 2.02 ± 0.1 | 11.2 |
III | 1.97 ± 0.08 | 230 ± 31 | 1.98 ± 0.08 | 8.6 |
I | 1.71 ± 0.04 | 232 ± 17 | 1.72 ± 0.04 | 7.4 |
II | 1.52 ± 0.1 | 252 ± 57 | 1.53 ± 0.1 | 6.0 |
V | 1.28 ± 0.05 | 324 ± 43 | 1.29 ± 0.05 | 4.0 |
scrambled | 0.73 ± 0.04 | 464 ± 70 | 0.74 ± 0.04 | 1.6 |
separatedb | 0.04 | 0.04 |
All experiments were performed in a 5 mM MES buffer solution, pH 5.5, that included 5 mM MgCl2, 100 mM NaCl, and 0.2 μg·mL–1 of the respective aptananozymes or control system and 5 mM H2O2.
The separated Cu2+ ion-functionalized C-dots/DBA system shows pseudo-first-order kinetics: k = 0.04 × 10–3 s–1.