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  • ZRB1006 - Anti-phospho-Stat3 (Tyr705) Antibody, clone 6C3, ZooMAb® Rabbit Monoclonal

ZRB1006 Sigma-Aldrich

Anti-phospho-Stat3 (Tyr705) Antibody, clone 6C3, ZooMAb® Rabbit Monoclonal

Green Alternative Antibody Enhanced Validation

recombinant, expressed in HEK 293 cells

Synonym: Acute-phase response factor, Signal transducer and activator of transcription 3



Related Categories 12 Principles Aligned Products, Alphabetical Index, Antibodies, Antibodies (Greener), Chemical Synthesis,
product line   ZooMAb® learn more
conjugate   unconjugated
clone   6C3, monoclonal
  recombinant monoclonal
biological source   rabbit (recombinant)
application(s)   immunohistochemistry (formalin-fixed, paraffin-embedded sections): 1:400-1:100
  inhibition assay: 1:10,000 (peptide)
  western blot: suitable using 1:1,000
species reactivity   human
species reactivity (predicted by homology)   monkey, mouse, rat
mol wt   calculated mol wt 88.07 kDa
  observed mol wt ~88 kDa
enhanced validation   recombinant expression
Learn more about Antibody Enhanced Validation
form   lyophilized
shipped in   ambient
storage temp.   2-8°C
packaging   antibody small pack of 25 μL
antibody form   purified antibody
isotype   IgG
recombinant   expressed in HEK 293 cells
antibody product type   primary antibodies
greener alternative product characteristics   Waste Prevention
Designing Safer Chemicals
Design for Energy Efficiency
Learn more about the Principles of Green Chemistry.
UniProt accession no.   P40763
Gene Information   human ... STAT3;APRF(6774)


General description

ZooMAb antibodies represent an entirely new generation of recombinant monoclonal antibodies.

Each ZooMAb antibody is manufactured using our proprietary recombinant expression system, purified to homogeneity, and precisely dispensed to produce robust and highly reproducible lot-to-lot consistency. Only top-performing clones are released for use by researchers. Each antibody is validated for high specificity and affinity across multiple applications, including its most commonly used application. ZooMAb antibodies are reliably available and ready to ship when you need them.

Learn more about ZooMAb here.


Clone 6C3 is a ZooMAb rabbit recombinant monoclonal antibody that specifically detects Stat3 phosphorylated on tyrosine 705.


KLH-conjugated linear peptide corresponding to 11 amino acids from the C-terminal region of human Stat3 surrounding phospho tyrosine 705.


Anti-phospho-Stat3 (Tyr705), clone 6C3 ZooMAb, Cat. No. ZRB1006, is a recombinant Rabbit Monoclonal Antibody that specifically targets Stat3 phosphorylated on Tyrosine 705 and has been tested for use in Immunohistochemistry (Paraffin), Peptide Inhibition Assay, and Western Blotting.

Immunohistochemistry (Paraffin) Analysis: A 1:400 dilution from a representative lot detected Stat3 in human breast cancer tissue sections.

Peptide Inhibition Analysis: A 1:10,000 dilution from a representative lot was used with SK-N-MC cells treated with Ciliary neurotrophic factor for peptide block analysis.

Target description

Signal transducer and activator of transcription 3 (UniProt: P40763; also known as Stat3, Acute-phase response factor) is encoded by the STAT3 (also known as APRF) gene (Gene ID: 6774) in human. STAT3 is expressed in most cell types and is activated by multiple cytokines and growth factors. It is a latent cytoplasmic transcription factor that has a dual function of signal transduction and activation of transcription. It mediates cellular responses to interleukins and growth factors. STAT3 shuttles between the nucleus and the cytoplasm. STAT3 is activated by phosphorylation at Tyrosine 705, which induces dimerization, nuclear translocation and DNA binding. A motif comprising of amino acids 150-162 is essential for its nuclear import. In the nucleus it recruits coactivators, such as NCOA1 or MED1, to the promoter region of the target genes. It binds to DNA as either a homodimer or as a heterodimer with STAT1. Constitutively activated STAT3 is reported in a number of human cancers. STAT3 regulates inflammatory response by regulating differentiation of naive CD4+ T-cells into T-helper Th17 or regulatory T-cells. STAT3 may also play an apoptotic role by transactivating BIRC5 expression under LEP activation. Ad cytoplasmic STAT3 is shown to repress macroautophagy by inhibiting EIF2AK2/PKR activity. This ZooMAb recombinant monoclonal antibody, generated by our propriety technology, offers significantly enhanced specificity, affinity, reproducibility, and stability over conventional monoclonals.

Physical form

Purified recombinant rabbit monoclonal antibody IgG, lyophilized in PBS with 5% Trehalose, normal appearance a coarse or translucent resin. Contains no biocide or preservatives, such as azide, or any animal by-products. Larger pack sizes provided as multiples of 25 μL.


120 μg/mL after reconstitution at 25 μL. Please refer to guidance on suggested starting dilutions and/or titers per application and sample type.

Storage and Stability

Recommend storage of lyophilized product at 2-8°C; Before reconstitution, micro-centrifuge vials briefly to spin down material to bottom of the vial; Reconstitute each vial by adding 25 μL of filtered lab grade water or PBS; Reconstituted antibodies can be stored at 2-8°C, or -20°C for long term storage. Avoid repeated freeze-thaws.


Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals.

Legal Information

ZooMAb is a registered trademark of Merck KGaA, Darmstadt, Germany

Safety & Documentation

Safety Information

WGK Germany 
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable


Certificate of Analysis (COA)

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Protocols & Articles


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