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FcγRIIb CHO-K1 Cell Propagation Model

Measure potency and stability of agonist antibodies that are FcγRIIb crosslinking-dependent

  • Used with co-stimulatory bioassays to crosslink antibodies that stimulate T cell activation
  • Measure FcγRIIb crosslinking dependence of agonist antibodies
  • Mechanism-of-action-based assay


Catalog number selected: J2232

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FcγRIIb CHO-K1 Cell Propagation Model
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Propagation and Banking of FcγRIIb CHO-K1 Cells

The antibodies used to stimulate T cell activation via interaction with co-stimulatory receptors on the effector cells can be cross-linked via binding to FcγRIIb receptors on CHO-K1 cells. Based on the properties of the antibody tested, the Co-Stimulatory Immune Checkpoint (i.e., OX40, CD40, GITR and 4-1BB) bioassays can be conducted in a single genetically engineered cell system or dual genetically engineered cell systems.

FcγRIIb CHO-K1 Cells are engineered to express human FcγRIIb. They are provided in Cell Propagation Model (CPM) format, which includes cryopreserved cells that can be thawed, propagated and banked for long-term use. These are not reporter cells, and function solely to crosslink anti-CD40, anti-OX40, anti-4-1BB or anti-GITR antibodies.


What's in the box?

Item Part # Size

FcγRIIb CHO-K1 Cells (CPM)

J223A 2 × 1ml

Certificate of Analysis

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Use Restrictions

Not For Medical Diagnostic Use.

Storage Conditions


Patents and Disclaimers

NOT FOR MEDICAL DIAGNOSTIC USE. FOR IN VITRO USE ONLY. BY USE OF THIS PRODUCT, RECIPIENT AGREES TO BE BOUND BY THE TERMS OF THIS LIMITED USE STATEMENT. If the recipient is not willing to accept the conditions of this limited use statement, and the product is unused, Promega will accept return of the unused product and provide the recipient with a full refund.

This product may not be further sold or transferred by the recipient and may be used only by the recipient, and then only for (1) research use, (2) discovery, development and monitoring of biologic drugs and vaccines, (3) quality assurance testing of biologic drugs and vaccines, and (4) product release assays for biologic drugs and vaccines. No other commercial use is allowed. "Commercial use" means any and all uses of this product by recipient for monetary or other consideration, including providing a service, information or data to unaffiliated third parties, and resale of this product for any use. Recipient has no right to modify, derivatize, genetically engineer or otherwise create variations of the cells or genes stably transfected within the cells except that recipient may propagate and store the cells for long-term use. In addition, recipient must use Bio-Glo™ Luciferase Assay System purchased from Promega Corporation for all luminescence assays using this product or contact Promega to obtain a license for use of this product with reagents other than Promega's. PROMEGA MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING AS TO MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE WITH REGARDS TO THIS PRODUCT. The terms of this agreement shall be governed under the laws of the State of Wisconsin, USA.

U.S. Pat. No. 8,008,006 and European Pat. No. 1341808.

Patent Pending.

Product cannot be used for proficiency testing.

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