“…d -Amino acid oxidase (DAAO) is the prototype of the FAD-dependent flavoprotein, which catalyzes the oxidative deamination of a majority of d -AAs rather than l -amino acids, producing the corresponding α-keto acid and ammonia. 14,15 Due to its high stereospecificity towards d -AAs, a number of d -amino acid biosensors based on DAAO coupled with different nanomaterials have been reported. 16,17 The use of nanomaterials for the construction of DAAO based biosensors has improved their sensitivity and anti-interference ability.…”