Tet-On® 3G Bidirectional Inducible Expression System (EF1alpha, ZsGreen1)

The Tet-On 3G Inducible Expression System (EF1alpha, ZsGreen1) is a powerful, tightly regulated, tetracycline-inducible mammalian expression system that is controlled by the addition of doxycycline to the culture medium. This system allows the simultaneous expression of a gene of interest and a green fluorescent protein (ZsGreen1) marker from a bidirectional, Tet-responsive promoter that binds the Tet-On 3G transactivator protein in the presence of doxycycline. It includes the pTRE3G-BI-ZsGreen1 Vector Set, consisting of a bidirectional vector into which the gene of interest can be cloned and simultaneously expressed with the ZsGreen1 marker, a bidirectional control vector that contains the luciferase gene in one of the two possible cloning sites, and two linear selection markers for hygromycin and puromycin resistance—and the pEF1a-Tet3G Vector, which constitutively expresses the Tet-On 3G transactivator protein from a human elongation factor 1 alpha (EF1α) promoter, allowing expression of the protein in a variety of mammalian cells (such as hematopoietic or stem cells) without the transgene silencing associated with CMV promoters. This system also includes our highly efficient Xfect Transfection Reagent and Tet System Approved FBS.