Intracellular Staining by Flow Cytometry
|Detection of RUNX3/CBFA3 in Human PBMC lymphocytes by Flow Cytometry. Human peripheral blood mononuclear cells (PBMC) lymphocytes either (A) untreated or (B) treated with PMA were stained with Mouse Anti-Human RUNX3/CBFA3 APC‑conjugated Monoclonal Antibody (Catalog # IC3765A, filled histogram) or isotype control antibody (Catalog # IC003A, open histogram). To facilitate intracellular staining, cells were fixed with Flow Cytometry Fixation Buffer (Catalog # FC004) and permeabilized with Flow Cytometry Permeabilization/Wash Buffer I (Catalog # FC005). View our protocol for Staining Intracellular Molecules.|
RUNX3, also known as CBFA3, AML-2 or PEBP2-alpha C, is a member of the Runt domain family of nuclear transcriptional regulators. All of the RUNX proteins form dimers with CBF-beta. The Runt domain, amino acids (aa) 54-186, is required for DNA binding, while a pro/ser/thr-rich region (aa 191-415) transcriptionally activates target genes. Isoform 2 has an alternate 19 aa in place of the N-terminal 5 aa of isoform 1. The 415 aa Human RUNX3 shares 91% aa identity with mouse or rat RUNX3. RUNX3 is necessary for growth control of gastric epithelium, neurogenesis of dorsal root ganglia, and T cell differentiation. RUNX3 expression is frequently mutated in tumors and appears to be silenced by methylation.
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