ZAP70 Antibody / T-cell Activation Threshold Antibody [clone ZPT70-2] (V3898)

ZAP70 Antibody / T-cell Activation Threshold Antibody. Immunohistochemistry analysis of formalin-fixed, paraffin-embedded human tonsil tissue using ZAP70 Antibody / T-cell Activation Threshold Antibody (clone ZPT70-2). Antigen retrieval was performed by boiling sections in pH 9 Tris-EDTA buffer for 10-20 minutes followed by cooling at room temperature. Cytoplasmic HRP-DAB brown staining is observed in dense lymphoid cell populations within tonsillar follicles and interfollicular regions, with variable staining intensity across adjacent cells. This heterogeneous pattern is consistent with Zeta-chain-associated protein kinase 70 (ZAP70) expression reflecting differences in signaling sensitivity and activation thresholds among lymphocytes. The staining highlights subsets of cells with varying activation potential, supporting the role of ZAP70 in regulating signal strength discrimination within lymphoid tissue architecture.

ZAP70 Antibody / T-cell Activation Threshold Antibody. Flow cytometry analysis of PFA-fixed human Jurkat T lymphocyte cells using ZAP70 Antibody / T-cell Activation Threshold Antibody (clone ZPT70-2). Cells were fixed and permeabilized to enable intracellular detection of Zeta-chain-associated protein kinase 70 (ZAP70), a key regulator of signaling sensitivity and activation thresholds in T cells. The blue histogram shows a clear rightward fluorescence shift compared to the red isotype control, indicating specific intracellular ZAP70 staining. The distribution and breadth of the signal are consistent with heterogeneous ZAP70 expression levels that reflect differences in signaling strength and activation potential within the cell population, supporting its role in T-cell activation threshold regulation.