Figure 1: Individual kinetics of GOx and HRP.

(a) Schematic representation of GOx/HRP cascade. (b) Oxygen concentration in a sealed vessel containing 1 nM GOx and 1 mM glucose in PBS (red), and the concentration of ABTS+· in PBS containing 1 nM GOx, 20 nM HRP, 1 mM glucose and 2 mM ABTS (blue) as function of time, error bars represent the s.d. of the three replicates. (c) HRP follows Michaelis–Menten kinetics; the activity of HRP was measured in PBS containing 1 nM HRP, 2 mM ABTS and different concentration of H2O2.