ID 4.2.3.21 DE vetispiradiene synthase. AN HVS. AN pemnaspirodiene synthase. AN vetispiradiene cyclase. AN vetispiradiene-forming farnesyl pyrophosphate cyclase. CA (2E,6E)-farnesyl diphosphate = (-)-vetispiradiene + diphosphate. CC -!- The initial internal cyclization produces the monocyclic intermediate CC germacrene A. DR Q39978, VTSS1_HYOMU; Q9XJ32, VTSS1_SOLTU; Q39979, VTSS2_HYOMU; DR Q39980, VTSS3_HYOMU; //