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  • A2105 - Anti-AP Endonuclease antibody, Mouse monoclonal

A2105 Sigma-Aldrich

Anti-AP Endonuclease antibody, Mouse monoclonal

clone APEREF, purified from hybridoma cell culture

Synonym: Anti-Apurinic/Apyrimidinic Endonuclease, Anti-AP lysase, Anti-APE/Ref1, Anti-APE1, Anti-APEN, Anti-APEX nuclease, Anti-APEX1, Anti-HAP1, Monoclonal Anti-AP Endonuclease antibody produced in mouse



Related Categories AA - CA, AO-AQ, Alphabetical Index, Antibodies, Antibodies for Epigenetics and Nuclear Signaling,
conjugate   unconjugated
clone   APEREF, monoclonal
biological source   mouse
application(s)   immunocytochemistry: suitable
  indirect ELISA: suitable
  microarray: suitable
  western blot: 0.5-1 μg/mL using total cell extract of Raji cells
species reactivity   rat, human, canine, mouse
mol wt   antigen ~37 kDa
form   buffered aqueous solution
shipped in   dry ice
storage temp.   −20°C
antibody form   purified immunoglobulin
isotype   IgG1
Quality Level   200
antibody product type   primary antibodies
concentration   ~2 mg/mL
UniProt accession no.   P27695
Gene Information   human ... APEX1(328)
mouse ... Apex1(11792)
rat ... Apex1(79116)


General description

AP endonuclease (APE/Ref1 or Apurinic/apyrimidinic endonuclease) is a crucial enzyme in the DNA base excision repair (BER) pathway. It recognizes baseless sites in the DNA following spontaneous base loss or removal of a damaged base by different DNA glycosylases. This enzyme is the major AP endonuclease in mammalian cells. The human enzyme shows a high degree of homology with other mammalian AP endonucleases (bovine, mouse, rat, and hamster). APE/Ref1 is a multifunctional enzyme. Its N-terminal region includes a nuclear localization sequence and a redox activity zone, while its AP endonuclease activity resides in the C-terminal region. Redox-factor 1 (Ref1) refers to the reduction/oxidation function of the enzyme.

Monoclonal Anti-AP Endonuclease recognizes human, canine, rat, and mouse AP endonuclease (approx. 37kDa).

The AP endonuclease is a DNA damage repair gene involved in base excision repair.


recombinant human AP endonuclease.


Applications in which this antibody has been used successfully, and the associated peer-reviewed papers, are given below.
Western Blotting (1 paper)

Mouse monoclonal anti-AP endonuclease antibodies have been used for western blot analysis. The antibody can also be used for microarray, indirect ELISA and immunocytochemistry assays.

Physical form

Solution in 0.01 M phosphate buffered saline, pH 7.4, containing 15 mM sodium azide.


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.

Biochem/physiol Actions

AP endonuclease (APE/Ref1 or Apurinic/apyrimidinic endonuclease) has a 3′-repair diesterase or phosphatase activity. The major DNA repair activity of the enzyme is nicking the DNA phosphodiester backbone 5′ to the AP site leaving a 3′-hydroxyl group and a 5′-deoxyribose phosphate. APE/Ref1 stimulates the DNA binding activity of many transcription factors (Fos, Jun, NF?B, PAX, HIF1, p53 and CREB), which are involved in cancer promotion and progression. The protein was found at elevated levels in several tumors (ovarian, prostate, cervical and germ cells). Redox-factor 1 (Ref1) maintains transcription factors in their active reduced states.

Safety & Documentation

Safety Information

WGK Germany 


Certificate of Analysis (COA)

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Protocols & Articles


Antibody Basics

Immunoglobulins (Igs) are produced by B lymphocytes and secreted into plasma. The Ig molecule in monomeric form is a glycoprotein with a molecular weight of approximately 150 kDa that is shaped more ...
Keywords: Affinity chromatography, Centrifugation, Chromatography, Digestions, Direct immunofluorescence, Gene expression, High performance liquid chromatography, Immunofluorescence, Ion Exchange, Microscopy, Precipitation, Purification, Rheumatology, Scanning electron microscopy

DNA Damage and Repair

Damage to cellular DNA is involved in mutagenesis and the development of cancer. The DNA in a human cell undergoes several thousand to a million damaging events per day, generated by both external (e...
Keywords: AGE, Alkylations, Apoptosis, Biochemistry, Cancer, Carcinogens, Catalysis, Clinical, DNA replication, Deaminations, Degradations, Eliminations, Environmental, Enzymology, Gene expression, Genetic, Infrared spectroscopy, Metabolites, Methylations, Mutagens, Oncology, Oxidations, Polymorphisms, Rearrangements, Recombination, Substitutions, Transcription, transformation


Western Blot Protocol | Immunoblotting Protocol

Western Blotting refers to the electrophoretic transfer of proteins from sodium dodecyl sulfate polyacrylamide gels to sheets of PVDF or nitrocellullose membrane, followed by immunodetection of prote...
Keywords: AGE, Buffers, Cell disruption, Detection methods, Detergents, Dialysis, Electroblotting, Electrophoresis, Enzyme activity, Gel electrophoresis, Immunoprecipitation, PAGE, Protein extraction, Purification, Sample preparations, Western blot

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Peer-Reviewed Papers


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