CTLA4:B7-1[Biotinylated] Inhibitor Screening Assay Kit

Catalog #: 72009
Size: 96 reactions
The activation of naïve T cells requires two signals, the specific T cell receptor recognition of MHC/Antigen on the surface of the antigen-presenting cell (APC), and the binding of B7-1 (CD80) ligand on the APC with the CD28 receptor on the T cell surface. Conversely, binding of CTLA4 to B7-1 on the T-cell surface results in an inhibitory signal and prevents T-cell activation. CTLA4:B7-1 interaction is an important drug target for the regulation of the host’s response to cancer.

The CTLA4:B7-1[Biotinylated] Inhibitor Screening Assay Kit is designed for screening and profiling inhibitors of CTLA4:B7-1 signaling. The key to this kit is the high sensitivity of detection of biotin-labeled B7-1 by streptavidin-HRP. Only a few simple steps on a microtiter plate are required for the assay. First, CTLA4 is coated on a 96-well plate. Next, B7-1 is incubated with CTLA4 on the plate. Finally, the plate is treated with streptavidin-HRP followed by addition of an HRP substrate to produce chemiluminescence, which can be measured using a chemiluminescence reader.

Cytotoxic T-lymphocyte-associated protein 4, CD152, CTLA-4 Counter-Receptor, B7.1, CD80
Supplied As:
This kit comes in a convenient 96-well format, with biotin-labeled B7-1, purified CTLA4, streptavidin-labeled HRP, and assay buffer for 100 binding reactions.
DMSO >1%, strong acids or bases, ionic detergents, high salt.

Instructions for use:
See assay kit data sheet for detailed protocol
Storage / Stability:
Stable at least 6 months from date of receipt, when stored as directed. Kit components require different storage conditions. Be sure to store each component at the proper temperature upon arrival.
This kit is useful for screening for inhibitors of B7-1 binding to CTLA4.
1. Linsley, P.S., et al. J. Exp. Med. 1991, 174(3): 561-569.
2. Hurwitz, A.A., et al. Canc. Res. 2000, 60: 2444-2448.

Avoid freeze/thaw cycles.
Scientific Category:
Immunotherapy/Cell Surface Receptor/Single-pass Transmembrane Protein
Product Type:
Assay Kit
Data shown is lot-specific. Contact us for specific information on other lots.

Quality Assurance

Product Datasheets