Fig. 3. (A) A comparison of the peroxidase activities of G quadruplex–hemin and CD–G quadruplex–hemin using the ABTS reaction (average of 3 points). (B) A digital image of the ABTS reaction with unconjugated G quadruplex (left) and the CD–G quadruplex–hemin nanoassembly (right). (C) The fluorescence response (digital images) of CDs in the CD–G quadruplex–hemin nanonetwork after the addition of hemin (middle) and after 15 min of ABTS reaction (right).