Stat4 (E687) polyclonal antibody

Q14765

Membrane receptor signaling by various ligands, including interferons and growth hormones such as EGF, induces activation of Jak kinases which then leads to tyrosine phosphorylation of the various Stat transcription factors. Stat1 and Stat2 are induced by IFN-alpha and form a heterodimer which is part of the ISGF3 transcription factor complex. Although early reports indicate Stat3 activation by EGF and IL-6, it has been shown that Stat3beta appears to be activated by both while Stat3alpha is activated by EGF, but not by IL-6. Highest expresion of Stat4 is seen in testis and myeloid cells. IL-12 has been identified as an activator of Stat4. Stat5 has been shown to be activated by prolactin and by IL-3. Stat6 is involved in IL-4 activated signaling pathways.

The antibody was affinity-purified from rabbit antiserum by affinity-chromatography using epitope-specific immunogen and the purity is > 95% (by SDS-PAGE).

STAT4 (E687) pAb detects endogenous levels of STAT4 protein.

Immunohistochemistry (IHC) analyzes of STAT4 (E687) pAb in paraffin-embedded human breast carcinoma tissue.

For research use only, not for use in diagnostic procedure.

Synthetic peptide, corresponding to amino acids 658-705 of Human Stat4.