ID 1.1.3.39 DE nucleoside oxidase (H2O2-forming). CA adenosine + 2 O2 + H2O = 9-riburonosyladenine + 2 H2O2 + H(+). CC -!- Other purine and pyrimidine nucleosides (as well as CC 2'-deoxyribonucleosides and arabinosides) are substrates, but ribose CC and nucleotides are not substrates. CC -!- The 5'-dehydro nucleoside is being released from the enzyme to serve CC as substrate for the second reaction. CC -!- Differs from EC 1.1.3.28 as it produces hydrogen peroxide rather than CC water. //