Aralia elata (Miq.)Seem.,an important medical plant of the family Araliacea, canbe used for the treatment of hepatitis, inhibiting cancer, enhancing the body immunity,and so on.Triterpenoid saponinisthe main medicial composition inAralia elatawhosesapogenin is oleanane. The biosynthetic pathway of triterpenoid saponin is known,Squalene epoxidase is a key enzyme of this pathway. Itcatalyses Squalene into2,3-Oxidosqual Squalene,the content and activity of itinfluences the yield of endproducts.Therefore, ithas...