Mammalian Cell Line Engineering Services  

Creating stable cell lines is time-consuming and complex. The trusted, experienced developers of GeneArt® TALs and GeneArt® CRISPRs can custom-design stable cell lines generated using one of the most robust and reliable technologies on the market. Utilizing quality products throughout the process—everything from Gibco® cell culture media and reagents and cell health assays, to next-generation sequencing using Ion Torrent™ sequencers—our scientists will work with you to design your stable cell line and perform quality control testing to help ensure that the cell line meets your requirements.

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CRISPR technology

Rapid and efficient editing with multiplexing capabilities. Learn more about the technology and how it works.

TALEN (TAL) technology

Precise and flexible editing; targeting any gene in any cell. Learn more about the technology and how it works.

Optimal CRISPR design at the touch of a finger

Quickly search and design optimal CRISPR gRNAs with minimal off-target effects on your desktop.

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Comparison of the CRISPR and TAL effector editing technologies

  CRISPR TAL effector
What is it? A DNA-cleaving protein guided by an RNA molecule that is able to modify a specific gene of interest A protein containing a DNA-cleaving activity and a DNA-binding region that can be programmed to recognize any gene of interest
Pros This technique is affordable and easy to use, and it works for high-throughput, multigene experiments
This technology is simpler and cheaper to customize for specific targets than other technologies, and typically has less off-target cleavage
Cons It can cleave off-target sites Constructs are more difficult to produce and deliver

Services offered

GeneArt® TALs or GeneArt® CRISPRs are efficient technologies for precise genome modifications in mammalian cells; the table below highlights just a few key gene-editing applications. Speak with our services expert for free consultation in designing the right cell line for your research.

Stable cell line generation service Description Genome editing tool Donor DNA synthesis
Knock-In Stable Cell Line Generation Add tags (e.g., luciferase, GFP) to your gene of interest; introduce/correct point mutations; safe harbor site (AAVS1) TAL or CRISPR Required
Knock-Out Stable Cell Line Generation Knock out endogenous gene or introduce deletions TAL or CRISPR Recommended
Activator Stable Cell Line Generation Activate/up-regulate endogenous gene expression TAL or CRISPR NA
Repressor Stable Cell Line Generation Repress/down-regulate endogenous gene expression TAL or CRISPR NA

What the service includes

We will apply our expertise in creating stable cell lines to design, develop, and validate a custom stable cell line as outlined below, using validated GeneArt® TALs or GeneArt® CRISPR and a customer-supplied cell line.

  • Protocol transfer and transfection optimization service
  • Custom GeneArt® TALs or GeneArt® CRISPR production
  • Validation of custom GeneArt® TALs or GeneArt® CRISPR efficacy
  • Stable cell line generation
  • Quality control analysis of stable cell line

Process and timelines

How rapidly we can deliver a custom stable cell line depends on the individual cell line growth characteristics and culturing requirements. Projects are typically completed within 23–30 weeks.

Workflow for GeneArt® TALs or GeneArt® CRISPR stable cell lines

Process for creating GeneArt® TALs or GeneArt® CRISPR stable cell lines


Q. How do you compare the CRISPR/Cas9 system with TALENs in terms of specificity for the target?
It is generally believed that TALENs have higher specific cleavage of the target than CRISPRs. Carefully designing the CRISPR target typically results in lower off-target effects. The cleavage efficiency of CRISPR or TALEN for the target locus can be measured using the GeneArt® Genomic Cleavage Detection Kit.

Q. Why would one use CRISPR as a screening tool before going to TALs?
Since cleavage efficiency at a particular locus depends on the accessibility of the locus, chromatin state, and sequence, it is advisable to test multiple different loci/regions within a gene of interest. With CRISPR/Cas9–mediated genome editing, for each target of interest the user needs only to change the 19–20 bp target-specific oligo. After targets have been screened and the sequence/locus with best cleavage efficiency has been identified with the fast and easy-to-use GeneArt® CRISPR system, the biologically relevant mutations can be precisely created with high-specificity GeneArt® TALs.

Q. What are the advantages/disadvantages of OFP vs. CD4 in the GeneArt® CRISPR Nuclease Vectors?
One could perform FACS-based sorting with OFP (orange fluorescent protein); either FACS or bead-based enrichment can be used for CD4. Find more details in the user manual.

How to order

To discuss your service project, obtain a Services Quotation, or to order, please contact our Custom Services department:

  • Phone (toll-free in North America): 1-800-955-6288 (extension 45682)
  • Fax (in North America): 716 774 3157
  • Email:

Technical resources

Downloadable tools

Web resources

New Genome Editing Support Center
Find tips, troubleshooting help, and resources for your genome editing applications

Video on TALEN technology

TALs technology tutorial
Watch this online tutorial, presented by Dr. Jon Chesnut, Research Fellow and R&D lead, to learn more about GeneArt® Precision TALs technology.