| 20110097798 | MAMMALIAN CELL EXPRESSION VECTORS AND UTILIZATION - An improved mammalian expression vector system which allows: (1) highly expressing exogenous proteins in host mammalian cells; (2) rapidly and efficiently screening recombinant stable cell lines expressing the gene of interest; (3) maintain sustainable expression and prevent gene silencing; and (4) effectively secreting proteins into media in some of cases. The entire expression vector system includes optimized promoters and core promoters, the use of special internal ribosome entry sites, integration of the bacterial backbone into the mammalian expression unit, multiple choices of selection markers, artificial matrix attachment region elements, effective secreting lead sequences and their 5′ and 3′ UTRs, and proper combinations of these expression elements. | 04-28-2011 |
