squalene monooxygenase activity Reactome:REACT_34517 squalene epoxidase activity Reactome:REACT_96471 Catalysis of the reaction: H(+) + NADPH + O(2) + squalene = (S)-2,3-epoxysqualene + H(2)O + NADP(+). KEGG:R02874 Reactome:REACT_77573 EC:1.14.13.132 squalene hydroxylase activity Reactome:REACT_9420 squalene oxydocyclase activity RHEA:25285 squalene-2,3-epoxide cyclase activity Reactome:REACT_100198 Reactome:REACT_80464 squalene,NADPH:oxygen oxidoreductase (2,3-epoxidizing) activity Reactome:REACT_80663 Reactome:REACT_61044 Reactome:REACT_31775 Reactome:REACT_32861 Reactome:REACT_80341 molecular_function Reactome:REACT_93218 MetaCyc:SQUALENE-MONOOXYGENASE-RXN Reactome:REACT_90369 GO:0004506 squalene 2,3-oxidocyclase activity squalene-2,3-epoxidase activity Reactome:REACT_103513 Reactome:REACT_99719 oxidoreductase activity, acting on paired donors, with incorporation or reduction of molecular oxygen, NAD(P)H as one donor, and incorporation of one atom of oxygen