ExpiCHO™ Expression System Kit
cGMP-banked ExpiCHO-S cells now available. Click HERE for product information.
ExpiCHO™ Expression System Kit
Gibco™

ExpiCHO™ Expression System Kit

The ExpiCHO™ Expression System Kit combines the power of rapid, ultra–high-yield transient protein production in suspension culture with the benefitRead more
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Catalog number A29133
Price (USD)
3,385.00
Each
Add to cart
Price (USD)
3,385.00
Each
Add to cart
The ExpiCHO™ Expression System Kit combines the power of rapid, ultra–high-yield transient protein production in suspension culture with the benefit of expression in Chinese hamster ovary (CHO) cells. It is based on high-density culture of ExpiCHO-S™ cells in ExpiCHO™ Expression Medium. Transient expression is powered by ExpiFectamine™ CHO transfection reagent, designed specifically for high-density CHO suspension culture, in combination with a specialized transfection enhancer and culture feed. All components work together synergistically to generate 2- to 10-fold higher protein yields than the HEK293-based Expi293™ Expression System Kit and 20- to 150-fold higher yields than the FreeStyle™ MAX CHO Expression System. Expression yields of 1 to 3 g per L of transfected culture have been demonstrated for some antibody and non-antibody proteins.

The ExpiCHO Expression System offers:

• Milligram to multigram yields of recombinant protein per liter of culture in 5 to 14 days post-transfection, which are frequently higher than transient 293-based systems
• Cost-effective transient expression in CHO cells, allowing scientists developing protein biotherapeutics to work with CHO-expressed proteins from start to finish in the drug development process
• A robust alternative mammalian transient expression host, allowing for production of proteins that are difficult to express in HEK293 cells
• Flexible, reliable culture and transfection protocols with multiple options that readily fit into current transient expression workflows
• Scalable expression for cultures from <1 mL to >10 L, thus generating the amount of protein needed for your application

The components included in the ExpiCHO Expression System Kit are: 2 vials of frozen ExpiCHO-S cells, 1 L of ExpiCHO Expression Medium, 1 ExpiFectamine CHO Transfection Kit sufficient to transfect 1 L of culture, OptiPRO™ SFM, and an antibody-expressing positive control vector. All components of the ExpiCHO Expression System Kit are also available for purchase separately. All components of the system are animal origin–free.
For Research Use Only. Not for use in diagnostic procedures.
Specifications
TypeExpression System
Protein TagUntagged
Delivery TypeTransfection
Quantity1 kit
Shipping ConditionApproved for shipment at Room Temperature or on Wet or Dry Ice
Cell LineCHO-S, SFM Adapted
Expression SystemMammalian
Product LineExpiCHO™
For Use With (Application)Protein Production, Constitutive Expression
PromoterCMV
Unit SizeEach
Contents & Storage
• 2 vials frozen ExpiCHO-S cells
• 1000 mL ExpiCHO Expression Medium
• 1 ExpiFectamine CHO Transfection Kit for 1 L of culture
• 1 vial Antibody Expressing Positive Control Vector
• 100 mL OptiPRO SFM

Store all components at 2-8°C, except frozen cells which should be stored in liquid nitrogen.

Frequently asked questions (FAQs)

How can I learn more about commercial licensing of Freedom kits, ExpiCHO-S Cells (cGMP banked), CHO-S Cells (cGMP banked), and CHO DG44 Cells (cGMP banked)?

To inquire about a Commercial Production or Service License, please email: outlicensing@thermofisher.com.

Find additional tips, troubleshooting help, and resources within our Protein Expression Support Center.

When subculturing ExpiCHO the day before a transfection to 3-4 x 10E6/mL, would you recommend pelleting the cells and resuspending them in completely fresh media, or simply replacing some of the media to split them down to the desired cell density?

Before transfecting ExpiCHO cells, there is no need to change out the media during the subculturing. This would become expensive and the conditioned media is not necessary.

Find additional tips, troubleshooting help, and resources within our Cell Culture Support Center.

For how many passages would you recommend using ExpiCHO cells before replacing them with new cells that were frozen at earlier passages?

For optimal performance with respect to protein production, we recommend thawing ExpiCHO cells and letting them grow for 2-3 passages prior to transfection. Overall, we do not recommend using the cells beyond ˜20 passages.

Find additional tips, troubleshooting help, and resources within our Cell Culture Support Center.

With the ExpiCHO Expression System, can I shake faster or slower than recommended?

We have provided optimal shake speeds for various formats. For most flasks, there is a drop-off in expression when you go too fast or slow because of cell shear stress or insufficient aeration. The effect is sharper in plates where there is a sharper transition between static and moving fluid in wells.

Find additional tips, troubleshooting help, and resources within our Protein Expression Support Center.

How many days should I wait before harvesting my protein with the ExpiCHO system?

Optimal time to harvest protein will depend on the specific properties of the protein being expressed and the protocol chosen. Typical harvest times to reach maximum titers for the various protocols are as follows:
- Standard Protocol: 8-10 days post-transfection
- High Titer Protocol: 10-12 days post-transfection
- Max Titer Protocol: 12-14 days post-transfection

Find additional tips, troubleshooting help, and resources within our Protein Expression Support Center.