Aphidicolan-16β-ol synthase (EC 4.2.3.42, PbACS) is an enzyme with systematic name 9α-copalyl-diphosphate diphosphate-lyase (aphidicolan-16β-ol-forming).[1][2] This enzyme catalyses the following chemical reaction
This is a bifunctional enzyme, which also has EC 5.5.1.14 activity.