OK2 is a designed peptide scaffold containing balanced hydrophobic and charged residues that promote structured binding to target proteins. Its flexible backbone supports a range of conformational states. Researchers evaluate its interaction kinetics and folding behavior. Applications include motif-discovery studies, ligand screening, and structural-activity mapping.
CAT No: R2847
OK2 is a synthetic peptide widely recognized for its utility in immunological and cell biology research. As a monoclonal antibody-derived peptide, it is specifically engineered to interact with the CD2 antigen, a surface glycoprotein prominently expressed on T lymphocytes and natural killer (NK) cells. The unique binding properties of OK2 have made it a valuable tool for probing T cell activation pathways, modulating immune cell interactions, and advancing the understanding of cellular immune responses. Its biochemical specificity and reliable performance have positioned it as an essential reagent for laboratories investigating immune signaling, cell adhesion, and related molecular mechanisms.
Immunological research: In the context of immunology, OK2 is extensively used to study T cell activation and signaling. By binding to the CD2 molecule, it can mimic or block natural ligand interactions, allowing researchers to dissect the molecular events underlying T cell receptor (TCR) co-stimulation and immune synapse formation. Such investigations are critical for elucidating the mechanisms that govern adaptive immune responses, providing insight into how T cells recognize and respond to antigens.
Cell adhesion studies: The peptide's affinity for CD2 also makes it instrumental in exploring cell-cell adhesion processes. CD2 is a key adhesion molecule that mediates interactions between T cells and antigen-presenting cells (APCs) through its ligand, CD58 (LFA-3). Utilizing OK2 enables precise modulation of these interactions in vitro, thereby facilitating the analysis of adhesion-dependent signaling cascades and the role of cell surface molecules in immune cell communication.
Flow cytometry and cell sorting: OK2 is frequently applied as a probe or blocking reagent in flow cytometry assays aimed at identifying and isolating CD2-expressing lymphocyte populations. The peptide's specificity allows for accurate discrimination of T cells and NK cells within heterogeneous cell mixtures, supporting downstream applications such as functional assays, gene expression profiling, and immune repertoire analysis. Its use enhances the precision and reproducibility of cell sorting protocols in both basic and translational research.
Functional modulation assays: Researchers employ OK2 in functional assays designed to modulate T cell responses, either by stimulating or inhibiting CD2-mediated signaling pathways. By manipulating these pathways, scientists can investigate the downstream effects on cytokine production, proliferation, and cytotoxic activity. These studies are pivotal for mapping the functional landscape of T cell subsets and for identifying molecular targets relevant to immune regulation.
Protein-protein interaction analysis: The peptide is also utilized to dissect the biochemistry of protein-protein interactions involving CD2. Through competitive binding or inhibition experiments, OK2 enables the characterization of binding affinities, interaction kinetics, and structural determinants of CD2-ligand complexes. Such analyses are fundamental to understanding the molecular architecture of immune cell interfaces and contribute to the rational design of novel immunomodulatory agents for research use.
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