The use of pAdVAntage vectors were transfected into mammalian cells can promote the initiation of translation to enhance the instantaneous protein expression in many cell types. Transfection of mammalian cells with expression vector often leads to the expression of the target protein. The double stranded RNA (dsRNA), which is produced in the transfection process, is thought to activate the dsRNA- activation inhibitor (DAI), which is one of the many kinds of enzymes involved in the host cell antiviral defense system. DAI phosphorylation of translation initiation factor eIF-2, termination of translation and generation of protein. However, with the pAdVAntage vector were transfected into DAI in the process of translation inhibition by RNA polymerase III generated adeno-associated virus type I (RNA VAI RNA) offset. RNA DAI combined with VAI to prevent its activation, so as to complete the translation and protein expression.