Humulene cyclase

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Humulene cyclase

(Science: enzyme) catalyses the cyclization of farnesyl pyrophosphate; probably by intramolecular electrophilic attack by c-1 bearing the pyrophosphate ester on c-11 of the terminal double bond to give a humulyl cation which is stabilised by deprotonation at c-9 to form all-trans humulene; mw 57 kd

registry number: EC 5.-