(âÂÂ)-camphene synthase (EC 4.2.3.117, CS) is an enzyme with systematic name geranyl-diphosphate diphosphate-lyase [cyclizing, (âÂÂ)-camphene-forming]. This enzyme catalyses the following chemical reaction
(âÂÂ)-Camphene is the major product in Abies grandis (grand fir) with traces of other monoterpenoids.