ID 5.4.99.54 DE beta-seco-amyrin synthase. CA (S)-2,3-epoxysqualene = beta-seco-amyrin. CC -!- The enzyme from Arabidopsis thaliana is multifunctional and produces CC about equal amounts of alpha- and beta-seco-amyrin. CC -!- See EC 5.4.99.52. DR Q9SYN1, PEN6_ARATH ; //