CD3 delta Antibody / CD3D, 100ug

CD3D antibody recognizes CD3 delta subunit, a type I transmembrane protein encoded by the CD3D gene and commonly referred to as CD3 delta chain. CD3 delta is an essential component of the T cell receptor CD3 complex, which mediates antigen recognition and intracellular signaling in T lymphocytes. As part of the multi-subunit TCR-CD3 complex, CD3 delta contributes to assembly, surface expression, and signal transduction required for adaptive immune responses. CD3D antibody supports research focused on T cell biology, immune signaling, and lymphoid tissue organization.<br><br>CD3 delta associates with CD3 gamma, CD3 epsilon, and CD3 zeta chains to form the invariant signaling module of the TCR complex. Upon antigen engagement by the T cell receptor, immunoreceptor tyrosine-based activation motifs within the cytoplasmic domains of CD3 subunits become phosphorylated, initiating downstream signaling cascades that regulate T cell activation, proliferation, and cytokine production. CD3 delta is localized predominantly at the plasma membrane in mature T cells, where it stabilizes receptor expression and contributes to immune synapse formation.<br><br>In normal human tissues, CD3 delta expression is restricted to T lymphocytes within thymus, lymph node, spleen, tonsil, and peripheral blood. Within lymphoid organs, CD3 staining highlights paracortical and interfollicular T cell zones, while B cell follicles and non-lymphoid cells remain largely negative. This lineage-specific distribution makes CD3D antibody a valuable marker for identifying T cell populations in research applications. Alterations in CD3 complex expression are relevant in studies of T cell immunodeficiency and T cell malignancies, where receptor composition and signaling capacity may be affected.<br><br>Clone CD3D/13089R is a recombinant rabbit monoclonal antibody generated by defined sequence expression to support lot-to-lot consistency and reproducible performance. CD3D antibody can be used to investigate T cell receptor signaling pathways, lymphoid tissue architecture, and adaptive immune mechanisms in experimental systems. Its defined specificity and membrane-associated staining profile make it suitable for studying T cell distribution and immune system function in normal and disease-associated tissues.

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