ammonia-lyase activity 7,8-didemethyl-8-hydroxy-5-deazariboflavin synthase activity https://github.com/geneontology/go-ontology/issues/25983 https://github.com/geneontology/go-ontology/issues/30193 MetaCyc:RXN-19230 RHEA:55204 molecular_function 2012-08-15T14:33:17Z jl GO:0044689 FO synthase Catalysis of the reaction: 5-amino-5-(4-hydroxybenzyl)-6-(D-ribitylimino)-5,6-dihydrouracil + S-adenosyl-L-methionine = 5'-deoxyadenosine + 7,8-didemethyl-8-hydroxy-5-deazariboflavin + H+ + L-methionine + NH4+. EC:4.3.1.32