aldehyde oxidase activity aryl-aldehyde oxidase activity https://github.com/geneontology/go-ontology/issues/28070 RHEA:58972 RHEA:58992 GO:0018488 Catalysis of the reaction: an aromatic aldehyde + O2 + H2O = an aromatic carboxylate + H2O2 + H+. RHEA:58968 MetaCyc:ARYL-ALDEHYDE-OXIDASE-RXN MetaCyc:RXN-8091 MetaCyc:RXN-8090 UM-BBD_reactionID:r0145 RHEA:58960 RHEA:18569 aryl-aldehyde:oxygen oxidoreductase activity RHEA:59008 molecular_function RHEA:58996 MetaCyc:RXN-8089 EC:1.2.3.9