oxidoreductase activity, acting on the CH-OH group of donors, oxygen as acceptor nucleoside oxidase (hydrogen peroxide-forming) activity https://github.com/geneontology/go-ontology/issues/30193 Two other reactions might be associated with this activity: (1a) adenosine + O2 = 5'-dehydroadenosine + hydrogen peroxide, and (1b) 5'-dehydroadenosine + O2 = 9-riburonosyladenine + hydrogen peroxide. molecular_function GO:0033716 EC:1.1.3.39 nucleoside:oxygen 5'-oxidoreductase (hydrogen peroxide-forming) activity MetaCyc:1.1.3.39-RXN Catalysis of the reaction: adenosine + 2 O2 + H2O = 9-riburonosyladenine + 2 H2O2 + H+. RHEA:15489