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📢 -40% on Recombinant Antibody Production. Available until November 16th on your first order. Code: RECAB40

Propel your transient expression to new heights with XtenCHO™ Race

  • 1.8 g/L : record-breaking productivity
  • 8 days of culture
  • 3.8 €/mg : a cost-effective solution
  • High quality proteins
  • All-in-one kit : Get started instantly !

Discover now

XtenCHO™ Race, the new mammalian transient expression system

Need a fast, cost-effective solution for high-quality protein production?

Advance your research without limitations with XtenCHO™ Race, the new mammalian protein expression kit. It empowers researchers to produce the proteins they need—without the usual time and budget constraints.
Focus on what truly matters—your discoveries.

  • High yields 1.8g/L*

    This high performance allows you to produce sufficient protein in a single run, reducing the need for repeated experiments and saving time, resources, and costs.

    (* Garetosmab, in flasks, no additionnal feeding)

  • Faster results,
    less waiting time

    Short production times of just 8 days for rapid protein expression, with up to 15 days for maximal output, enabling you to stay ahead in your research and streamline your development process.

  • A cost effective solution

    Start with the high-performance XtenCHO™ Race Starter Kit for just $2321. With a low production cost of $3.98/mg (-70% compared to market leading solution), produce more protein faster while minimizing consumables and optimizing your budget.

Production yields obtained with XtenCHO™ Race are twice higher than those obtained with the market leader expression system

Production of Therapeutic antibodies

XtenCHO™ Race outperforms up to 6X (Cixutumumab and Peresolimab)

NB: Crude production yields in mg/L obtained in 24-well plates cultures without feeding (Octet Analysis)
Yields in flask (better aeration) will be 1.5 to 2.5 Higher for Human/humanized IgG1/IgG4 (depending on the antibody considered)

Special Launch Offer

Get an exclusive 20% off your first
XtenCHO™ Race Starter Kit

until May 31. 2025, with the promo code XTEN20

Receive XtenCHO™ Race Starter Kit at -20%

Ensure consistent protein quality and functionality for therapeutic antibody breakthroughs

XtenCHO™ Race delivers high yields and fast production without compromising quality. Designed for biopharma research, it ensures highly active, functional proteins, allowing scientists to trust the reliability of their results.

  • High Quality,
    Reliable Expression

    XtenCHO™ Race delivers fully functional molecules with optimized integrity and post-translational modifications, ensuring reliable results and streamlined downstream processing.

  • Using CHO Cells

    Used in over 75% of approved biopharmaceuticals, CHO cells are the gold standard for therapeutic protein production. Eliminate the need to switch technologies.

  • Serum-Free, Animal-Free, Chemically-Defined

    Ensuring optimal safety, minimal contamination risks, and consistent, reproducible results.

XtenCHO™ Race : the scalable solution for every stage from research to bioproduction

No matter where you are in your journey—whether driving early-stage R&D, or advancing drug candidate development—XtenCHO™ Race adapts to your needs at every step:

 

  • High-throughput antibody production

    Test hundreds of compounds in parallel in a few weeks, already in CHO

  • Small-scale production

    Produce dozens of compounds in parallel, from milligrams to grams.

  • Mid-to-large scale production

    XtenCHO™ Race enables you to produce several dozens grams within weeks

XtenCHO™ Race: Unmatched Market Performance

XtenCHO™ Race stands out from other expression systems due to its exceptional performance and productivity in transient protein expression, particularly for monoclonal antibody production.

Yields (mg/L), Olaratumab, in Flasks

Get started with confidence and ease

Designed for speed and cost-efficiency, XtenCHO™ Race was created by our team of antibody production experts to deliver a robust, optimized, and user-friendly protocol for your applications. With step-by-step video tutorials and a dedicated support team, you will receive expert guidance at every stage, making protein production simplier and more efficient than ever.

  • Developed by antibody production experts

    XtenCHO™ Race was developed by our in-house research teams specialized in antibody and antigen production.

  • Preliminary study

    Day-by-day video tutorial

    Enjoy our exclusive day-by-day tutorial – Simply enter your email on the start date of your production, and receive a daily video with guidance on the tasks.

  • A dedicated support team

    Have a question or struggling to achieve optimal performance? To help you make the most of your new expression system, a dedicated support team will assist you during the whole process.

Handbook

Transient protein expression

What is inside your XtenCHO™ Race Starter Kit?

The XtenCHO™ Race Starter Kit provides all essential components to kickstart your protein production with complete peace of mind. It includes high-performance XtenCHO™ Race cells, an optimized expression vector, proprietary expression medium, transfection reagents, and key enhancers—all carefully designed to ensure maximum yield, stability, and efficiency. With everything pre-optimized and ready to use, you can focus on your research with serenity and confidence.

 

Element Storage Details
XtenCHO™ Race cells 2 cryotubes of 1 ml Liquid nitrogen
pXten1 Expression Vector 1 microtube of 10 µl -20°C
XtenCHO™ Expression Medium 1 bottle of 1 L 4°C, protect from light
Antibody Expression Positive Control Vector (1 µg/µL in T10E1 buffer, pH8) 1 microtube of 150 µl -20°C
XtenFect Reagent, Stock solution 1 microtube stock solution of 0.51 ml -80°C, until dilution
XtenFect Reagent, Working solution 3 microtubes of 1.44 ml -20°C, until reconstitution
XtenCHO™ Race Enhancer 3 microtubes of 1.2 ml -20°C

FAQ

 

How can you easily switch
your expression system?

Discover our exclusive guide exploring pros ans cons
of switching expression systems and providing tips
for a smooth transition

Read Now

Resource center

  • Webinar Replay

    Proven strategies to boost your antibody expression

    Watch the replay

  • User Guide

    XtenCHO™ Race Starter Kit technical Guide and Protocol

    Download now

  • Infographic

    Comparison of XtenCHO™ Race with home-made solutions

    Download now

  • Poster

    Discover XtenCHO™ Race performance in a complete poster

    Download now

  • Brochure

    Learn more about our ultra fast transient expression solution

    Download now

  • Blog article

    What are the advantages of using a transient CHO system over HEK293?

    Read

  • Blog article

    A guide to mammalian cell-based expression systems

    Read

  • Blog article

    Applications of the XtenCHO™ Race transient expression system

    Read more

  • Blog article

    The Best CHO Expression System Kits on the Market

    Discover

  • Video

    Unboxing XtenCHO™ Race

    Watch now

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