pCI-neo Mammalian Expression Vector

The pCI-neo Mammalian Expression Vector carries the human cytomegalovirus (CMV) immediate-early enhancer/promoter region to promote constitutive expression of cloned DNA inserts in mammalian cells. This vector also contains the neomycin phosphotransferase gene, a selectable marker for mammalian cells. The pCI-neo Vector can be used for transient or stable expression by selecting transfected cells with the antibiotic G-418.

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The pCI-neo Mammalian Expression Vector carries the human cytomegalovirus (CMV) immediate-early enhancer/promoter region to promote constitutive expression of cloned DNA inserts in mammalian cells. This vector also contains the neomycin phosphotransferase gene, a selectable marker for mammalian cells. The pCI-neo Vector can be used for transient or stable expression by selecting transfected cells with the antibiotic G-418.

Features - Benefits

• Strong, Constitutive Expression: The human cytomegalovirus (CMV) immediate-early enhancer/promoter region produces strong, constitutive expression. A β-globin/IgG chimeric intron located downstream from the enhancer/promoter region can further increase expression. The vector is maintained as an episome in cells expressing the SV40 large T antigen, leading to even higher levels of expression.
• Transient or Stable Expression: The neomycin phosphotransferase gene allows selection of stable transfected cells.
• Increased Steady-State mRNA Levels: The late SV40 polyadenylation signal increases the steady-state level of RNA approximately fivefold more than the early SV40 polyadenylation signal.
• Convenient: Multiple cloning sites exist for easy insertion of cDNA.
• Versatile: Synthesize transcripts in vitro using the T7 RNA polymerase promoter or generate single-stranded DNA in E. coli using the f1 origin of replication.

References

1. Brinster, R.L. et al. (1988) Proc. Natl. Acad. Sci. USA 85, 836–40.
2. Choi, T. et al. (1991) Mol. Cell. Biol. 11, 3070–4.
3. Palmiter, R.D. et al. (1991) Proc. Natl. Acad. Sci. USA 88, 478–82.
4. Carswell, S. and Alwine, J.C. (1989) Mol. Cell. Biol. 9, 4248–58.

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