Stable cell line generation

Bioproduction form

ProteoGenix strives to overcome the economic issues related to stable cell line generation by proposing the most productive affordable IP cell lines on the market. With strong yield guarantees, our stable cell line development service based on our proprietary cell line aims at offering high productivity at competitive price and without royalties! ProteoGenix also offers all other most common cell lines to perfectly meet your project requirements!

Why choose ProteoGenix for your
stable cell line generation?

FTO stable cell line
Proprietary cell line

Benefit from our proprietary cell line without any restriction use!

yield guaranteed stable cell line services
Yields guaranteed

Secure your investment by choosing our unique yield guaranteed service!

CMO transferrable recombinant antibody production process
CMO transferrable

Benefit from a fast cell line transfer to our CMO partners for cGMP bioproduction.

cell line diversity for stable cell line generation
Cell line diversity

Proprietary CHO, CHO-S, CHO-DG44, HEK293 or even your preferred cell line… Get a service adapted to your requirements!

recombinant antibody production experts
Protein production experts

1500+ recombinant proteins successfully produced, 300+ monoclonal antibodies developed. Choose a leading bioproduction company.

stable cell line custom process
Custom process

Keep the control! Our stable cell line development service includes several milestones for a unique flexibility!

ProteoGenix strives to propose best-in-class services from target selection to bioproduction. Our unique knowledge of the whole process combined to our expertise in monoclonal antibody development and protein production is your best guarantee to obtain a high producing stable cell line.

As a major actor in the therapeutic antibody development field, bringing your biotherapeutic from the bench to the clinic is our challenge. Let us bear your stable cell line development project and pave your way on the road to success!

Discover our stable cell line development service content

gene synthesis for recombinant antibody production
  • Expression vector construction

Gene synthesis optimized for the target expression system.
Gene subcloning in a high performing expression vector.

stable transfection for stable cell line generation
  • Host cell transfection and generation of stable pools

Transfection of the host cells with the recombinant plasmid.
Generation and characterization of several stable transfected pools.

stable pools selection for stable cell line development
  • Characterization of the best stable pools

Selection and amplification of the most producing stable pools for further clone selection.

Go/No Go1

isolated clone selection for stable expression cell line
  • Isolation and selection of the best monoclones

Isolation of monoclones by limiting dilution.
Screening by ELISA, WB, FACS, IP or Octet Red96.
Selection and expansion of the most producing clones.

Monoclone characterization for stable cell line development
  • Characterization of the best monoclones

Productivity evaluation in batch and/or fed-batch culture
RCB preparation and stability study

Go/No Go2

Upstream recombinant antibody production process optimization
  • Upstream process optimization

Test of several culture medium and several feed strategy (media/culture optimization).

Stable cell line transfer
  • Stable cell line and protocol transfer
Stable cell line customer transfer
CHO cell line CMO transfer
Step Content Timeline Deliverables
Gene synthesis
  • Gene design including codon optimization
  • Gene synthesis
  • Subcloning in expression vector
3 to 4 weeks
  • Gene optimized for the desired expression system
  • Gene cloned in pUC57 plasmid
Stable pool generation
  • Stable transfection
  • Pool selection and amplification
9 to 10 weeks
  • 50mL of the supernatant from stable pool
  • Stable pool vials
  • Detailed report
Single cell clones screening and subcloning
  • Subcloning of the top producing clones
  • Characterization of clones
  • Stability study
  • RCB preparation
~4 months
  • Research cell bank -tested for Mycoplasma
  • Certificate of Analysis
  • Detailed report
Process optimization
  • Test of several media/feed conditions
4 to 5 weeks
  • Detailed report
  • Optimized protocol transfer
  • PoC based on transient expression evaluation before to start
  • Additional characterization (KD determination, thermostability, aggregation…)
  • RCB stability study
  • Master and working cell bank development
  • Scale up production / Bioreactor
Available cell lines
Proprietary CHO
  • Affordable licensing opportunities without royalties (one-time fee payment)
  • Methotrexate (MTX)/DHFR-mediated amplification and selection
  • or
  • Methionine Sulfoximine (MSX)/GS-mediated amplification and selection
  • Rapid and easy transfer for cGMP production

  • No Licence fee before moving towards commercial use
  • Methotrexate (MTX)/DHFR-mediated amplification and selection
  • or
  • Methionine Sulfoximine (MSX)/GS-mediated amplification and selection
  • No Licence fee before moving towards commercial use
  • Methotrexate (MTX)/DHFR-mediated amplification and selection
  • Used for the bioproduction of FDA-approved biotherapeutics
Proprietary GSN
(Coming soon)
  • Yields > 5-6g/L
  • Affordable license fees
  • Highly efficient GS-mediated clone amplification and selection
  • Rapid and easy transfer for cGMP production
Other cell lines available
  • HEK293, 293F, 293E
  • Customer cell line

As each stable cell line generation project is unique, our service is tailored to meet your requirements and ensure a safe investment. Send your requirements to our PhD account managers who will construct your customized offer. Our stable cell line development service is composed of several milestones (Go/ No Go steps) that are accompanied by a detailed report and discussed with our expert team. This way to construct your project represents the insurance to be accompanied over the whole development process and offers you a unique flexibility.

Transient antibody production cell line

Don’t reach high antibody transient expression yield? Perform a transient expression evaluation on our best-in-class high producing proprietary CHO cell line XtenCHOTM.

Our XtenCHOTM cell line coupled to our in-house Xten Protocol is your best guarantee to overcome your difficult-to-express protein challenge. This is usually a first step before moving to a stable cell line development in order to ensure that all antibody features meet requirements in CHO based productions.

We maximize your chance to get a high producing stable cell line at competitive price

As a contract research organization (CRO) having successfully produced more than 1500 recombinant proteins and 300 monoclonal antibodies, ProteoGenix constantly strives to propose innovative tools to satisfy and even exceed its customer’s requirements. Proposing a high performance cell line at competitive price is one of our daily challenges. For this reason, a team of dedicated R&D experts is currently working on the development of one of the most productive GS deficient cell line on the market.

You need to develop a highly productive stable cell line? Try our customized stable cell line development service.

Metabolic selection and amplification for stable cell line generation

Selection of highly productive stable cell clones is of primary importance when it comes to stable cell line development. Metabolic selection has become the preferred method to select the most productive clones for bioproduction for several decades now. This field is characterized by an intense research activity due to the important economic issues related to the production of biotherapeutics. Overcoming this challenge means reducing the production costs by increasing the productivity of stable cell lines while reducing their development timelines. Metabolic selection is based on the disruption of a vital metabolic pathway. In the biopharmaceutical industry, the enzymes glutamine synthetase (GS) and dihydrofolate reductase (DHFR) are the most commonly used selectable markers for the disruption of metabolic pathways. GS and DHFR are involved in the synthesis of the vital metabolites glutamine and purines, respectively.

When using a metabolic selection strategy, the stable clone selection process is based on cell culture in a medium lacking the vital metabolite. Thus, only the cells able to endogenously produce the target metabolite will be able to survive in the culture media. In expression systems lacking DHFR or GS activity, endogenous production of the vital metabolite is only possible for cells stably transfected with a plasmid containing the GS or DHFR gene. This selection process can further be amplified by the addition of DHFR or GS inhibitors such as MTX or MSX, respectively. Stepwise increasing of inhibitor concentration leads to gene amplification in order to overexpress GS or DHFR. Therefore, since the marker gene is linked to the recombinant protein gene to express (both genes on the same plasmid), recombinant protein production is amplified in the same proportion as the marker production.

As a protein production expert, ProteoGenix masters all the steps of the process leading to a highly productive and stable CHO cell line. Coupled to our proprietary cell line and to unrivalled guarantees, our expertise ensures you a safe investment and a strong ROI.