Figure 1.

(A) Schematic synthesis of DBA-functionalized pA-AuNPs acting as aptananozymes. (B) The aptananozyme-catalyzed oxidation of dopamine to aminochrome by H₂O₂, Panel I and (Panel II) the aptananozyme-catalyzed oxidation of dopamine to aminochrome using the aptananozyme as a bioreactor, revealing dual consecutive catalytic functions consisting of the catalyzed aerobic oxidation of glucose to gluconic acid and H₂O₂, followed by the catalyzed oxidation of dopamine to aminochrome by the H₂O₂, Panel II.