exo-α-Bergamotene synthase (EC 4.2.3.81, trans-α-bergamotene synthase, LaBERS (gene)) is an enzyme with systematic name (2E,6E)-farnesyl diphosphate lyase (cyclizing, (–)-exo-α-bergamotene-forming).
[1][2] This enzyme catalyses the following chemical reaction: The enzyme synthesizes a mixture of sesquiterpenoids from (2E,6E)-farnesyl diphosphate.