| Application | Recommended Dilution |
|---|---|
| ELISA | 1:5000-1:50000 |
CTLA4 (Cytotoxic T-Lymphocyte-Associated Protein 4), also designated CD152, serves as a critical immune checkpoint receptor that downregulates T cell activation. Expressed primarily on activated T cells and regulatory T cells, CTLA4 competes with CD28 for binding to B7 ligands, delivering inhibitory signals that maintain immune homeostasis. This regulatory function has positioned CTLA4 as a cornerstone target in cancer immunotherapy research, autoimmune disease studies, and investigations into immune tolerance mechanisms. Genetic associations with conditions including insulin-dependent diabetes mellitus and celiac disease further underscore its significance in understanding immune dysregulation.
This recombinant monoclonal antibody, clone 12E8, offers researchers the reproducibility essential for longitudinal studies and multi-site collaborations. Engineered as a human IgG1 isotype and produced through recombinant technology, this antibody provides sequence-defined consistency that eliminates the lot-to-lot variability inherent in traditional hybridoma-derived reagents. Affinity chromatography purification ensures high purity suitable for sensitive detection methods.
Functional ELISA validation demonstrates robust binding characteristics, with the antibody showing strong affinity for biotinylated human CTLA4 protein at EC50 values of 10.57–15.25 ng/mL. Additional validation confirms binding to Peptostreptococcus magnus protein L with exceptional sensitivity, yielding EC50 values in the 1.6–2.4 ng/mL range across multiple protein L preparations. For ELISA applications, dilutions ranging from 1:5000 to 1:50000 provide flexibility for optimization across different experimental conditions.
This antibody supports research programs focused on immunology and stem cell biology, offering a reliable tool for investigators exploring immune checkpoint pathways, T cell regulation, and therapeutic targeting strategies.
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