Stable Cell Line Selection Service

The most commonly used method to study the function of a gene is to overexpress the gene in host cells or knock-down the gene by RNA interference. The conventional methods include transient transfection and selection of stable cell lines. Screening out stable cell lines with overexpression of the gene or RNA interference will bring great convenience to your experiment. With stable cell lines, later Co-IP or Pull-Down experiments will be very convenient; cell lines stably expressing recombinant fluorescent proteins can allow you to dynamically observe the movement of molecules in cells. The basic principle of constructing a stable cell line is to clone the foreign DNA into a vector with a certain resistance, the vector is transfected into the host cell and integrated into the host chromosome, and the resistance marker contained in the vector is used for screening. The most commonly used eukaryotic expression vector resistance screening markers are neomycin, hygromycin and puromycin. G418 is commonly used instead of neomycin for selective screening. Stably express the target protein, or stably express a cell line that silences a specific gene.

Overall solutions

CD BioSciences method for screening stable cell lines

1) After transfection of the plasmid, the monoclonal method is used to screen stable cell lines

2) Screening of stable cell lines for lentivirus infection

The lentiviral infection method is more convenient and efficient than the plasmid transfection method for screening monoclonal cells, and it is the current mainstream method for screening stable cell lines. Lentivirus can infect almost all kinds of cells, and after infection, it can integrate into the genome of the infected cell for long-term stable expression. Therefore, lentivirus is often used to prepare monoclonal cell lines that stably express/silence specific genes.

CD BioSciences constructs packaged puromycin-resistant lentivirus. After infecting the target cells, it can be selectively screened by adding puromycin to obtain cell lines stably expressing shRNA or specific genes.

CD BioSciences provides virus packaging services (you can complete steady-state cell screening by yourself), or a one-stop stable cell line screening service.

Our service items

Project name Stable cell line selection service
Our Advantages
  • Excellent seeds-carefully selected low-generation cell sources, no mycoplasma, no black glue insects.
  • All CD BioSciences cells have a low generation number and no pollution, and can provide STR test reports.
  • Stable traits-strict screening and target gene expression verification system.
  • All CD BioSciences stable transgenic strains are verified by RT-qPCR to ensure the expression level.
Product delivery mode We will complete the project on time according to the agreed time, summarize the experimental data and conclusions, and complete the experimental report.
Price Inquiry

Why choose us?

CD BioSciences provides professional stable cell line selection service, which can meet the needs of regular customers for hit identification on time and on budget. CD BioSciences relies on world-class viral vector technology expertise, we provide the highest quality one-stop Stable cell line selection service for gene delivery, including the design and construction of lentiviral vectors according to different experimental needs. Please feel free to contact us for more detailed information, our scientists will tailor the most reasonable plan for your project.


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