| Application | Recommended Dilution |
|---|---|
| WB | 1:1000-1:5000 |
| IF | 1:20-1:200 |
| FC | 1:20-1:200 |
CTLA4 (Cytotoxic T-Lymphocyte-Associated Protein 4), also designated CD152, serves as a critical immune checkpoint receptor that negatively regulates T cell activation. Expressed primarily on activated T cells and constitutively on 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 at the forefront of cancer immunotherapy research, where blocking this checkpoint has demonstrated remarkable therapeutic potential. Additionally, CTLA4 polymorphisms have been associated with autoimmune conditions including type 1 diabetes and celiac disease, making it a valuable target for understanding immune dysregulation.
This recombinant monoclonal antibody, clone 13D6, offers the reproducibility and consistency that demanding immunology research requires. Produced using recombinant technology with a sequence-defined approach, this antibody eliminates the lot-to-lot variability that can compromise longitudinal studies and multi-site collaborations. The mouse IgG2a isotype antibody has been raised against recombinant human CTLA4 protein and purified by affinity chromatography to ensure optimal specificity.
Validation across multiple platforms demonstrates versatile experimental utility. Western blot analysis confirms detection of the expected 25 kDa band across diverse human cell lines including HepG2, K562, SY5Y, U251, PC-3, 293, and MCF7, with recommended dilutions of 1:1000–1:5000. Immunofluorescence studies in HepG2 cells reveal clear cellular localization, while flow cytometry analysis of Jurkat cells confirms reliable surface staining for phenotypic characterization.
Whether investigating checkpoint inhibitor mechanisms, characterizing regulatory T cell populations, or exploring CTLA4's role in autoimmune pathogenesis, this antibody provides a dependable tool for advancing immunology and stem cell research.
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