MAVSELEVDGVVFPPLARPPGSAHAHFLAGAGVRGMEIGGHFIKFTAIGVYLQADAAVSALAAKWAGKPAADLASDAAFFRDVVTGEFEKFTRVTMILPLTGAQYSDKVTENCVAYWKAAGVYTDAEAAAVDKFKEAFGPHSFAPGASILFTHSPAGVLTVAFSKDSSVPESGGVAIENARLCEAVLESIIGEHGVSPAAKLSLANRVAELLKGAAHAGGEPAAEPVPVSV CHI Chalcone--flavonone isomerase Catalyzes the intramolecular cyclization of bicyclic chalcones into tricyclic (S)-flavanones. Responsible for the isomerization of 4,2',4',6'-tetrahydroxychalcone (also termed chalcone) into naringenin. CFI_HORVU 231