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High-efficiency transformation of mammalian cells by plasmid DNA.

Open access
Chen, C, Okayama, H·1987·Molecular and Cellular Biology

Abstract

We describe a simple calcium phosphate transfection protocol and neo marker vectors that achieve highly efficient transformation of mammalian cells. In this protocol, the calcium phosphate-DNA complex is formed gradually in the medium during incubation with cells and precipitates on the cells. The crucial factors for obtaining efficient transformation are the pH (6.95) of the buffer used for the calcium phosphate precipitation, the CO2 level (3%) during the incubation of the DNA with the cells, and the amount (20 to 30 micrograms) and the form (circular) of DNA. In sharp contrast to the results with circular DNA, linear DNA is almost inactive. Under these conditions, 50% of mouse L(A9) cells can be stably transformed with pcDneo, a simian virus 40-based neo (neomycin resistance) marker vector. The NIH3T3, C127, CV1, BHK, CHO, and HeLa cell lines were transformed at efficiencies of 10 to 50% with this vector and the neo marker-incorporated pcD vectors that were used for the construction and transduction of cDNA expression libraries as well as for the expression of cloned cDNA in mammalian cells.

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Metadata

Authors
Chen, C., & Okayama, H.
Venue
Molecular and Cellular Biology
Published
1987-08
Volume
7
Issue
8
Pages
2745-2752
ISSN
  • 0270-7306 (ISSN-L)
  • 1098-5549
OpenAlex
W1954929088
Cited by
5,373
References
2
FWCI
41.88
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: High-efficiency transformation of mammalian cells by plasmid DNA. https://app.cochat.ai/papers/10.1128/mcb.7.8.2745
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Chen, C., & Okayama, H. (1987). High-efficiency transformation of mammalian cells by plasmid DNA. Molecular and Cellular Biology. https://doi.org/10.1128/mcb.7.8.2745

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