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. 2021 Jul 21;143(30):11510–11519. doi: 10.1021/jacs.1c03939

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  
a

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.

b

The separated Cu2+ ion-functionalized C-dots/DBA system shows pseudo-first-order kinetics: k = 0.04 × 10–3 s–1.