Figure 5: GOx–HRP cascade with catalase competition.

(a) Schematic of the GOx–HRP cascade coupled with a competing reaction catalysed by catalase. (b) The suppression of ABTS+· production from the GOx–HRP conjugate by addition of catalase; here the reaction velocity of GOx is 11.8 nM s−1 and Vmax of HRP is 25.3 nM s−1. For the free GOx–HRP experiment, see Supplementary Fig. 15.