Anti-COX2 / Cyclooxygenase 2 antibody [SP21] (ab16701)

Rabbit monoclonal COX2 / Cyclooxygenase 2 antibody [SP21]. Validated in IHC and tested in Human. Cited in 4 publication(s).


  • Product name

    Anti-COX2 / Cyclooxygenase 2 antibody [SP21]
    See all COX2 / Cyclooxygenase 2 primary antibodies
  • Description

    Rabbit monoclonal [SP21] to COX2 / Cyclooxygenase 2
  • Host species

  • Tested applications

    Suitable for: IHC-Fr, IHC-Pmore details
    Unsuitable for: WB
  • Species reactivity

    Reacts with: Human
    Predicted to work with: Mouse, Rat
  • Immunogen

    Synthetic peptide within Rat COX2/ Cyclooxygenase 2 (C terminal). The exact sequence is proprietary.

  • Positive control

    • Lung carcinoma, colon carcinoma and breast carcinoma; HT 29 lysate.


Our Abpromise guarantee covers the use of ab16701 in the following tested applications.

The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.

Application Abreviews Notes
IHC-Fr Use at an assay dependent concentration.
IHC-P 1/100. Perform heat mediated antigen retrieval before commencing with IHC staining protocol.
  • Application notes
    Is unsuitable for WB.
  • Target

    • Function

      Mediates the formation of prostaglandins from arachidonate. May have a role as a major mediator of inflammation and/or a role for prostanoid signaling in activity-dependent plasticity.
    • Pathway

      Lipid metabolism; prostaglandin biosynthesis.
    • Sequence similarities

      Belongs to the prostaglandin G/H synthase family.
      Contains 1 EGF-like domain.
    • Post-translational

      S-nitrosylation by NOS2 (iNOS) activates enzme activity. S-nitrosylation may take place on different Cys residues in addition to Cys-561.
    • Cellular localization

      Microsome membrane. Endoplasmic reticulum membrane.
    • Information by UniProt
    • Database links

    • Alternative names

      • COX 2 antibody
      • COX-2 antibody
      • COX2 antibody
      • Cyclooxygenase 2 antibody
      • Cyclooxygenase 2b antibody
      • Cyclooxygenase antibody
      • Cyclooxygenase-2 antibody
      • Cyclooxygenase2 antibody
      • EC antibody
      • fj02a10 antibody
      • Glucocorticoid-regulated inflammatory cyclooxygenase antibody
      • Glucocorticoid-regulated inflammatory Prostaglandin G/H synthase antibody
      • GRIPGHS antibody
      • hCox 2 antibody
      • Macrophage activation-associated marker protein P71/73 antibody
      • OTTHUMP00000033524 antibody
      • PES-2 antibody
      • PGG/HS antibody
      • PGH synthase 2 antibody
      • PGH2_HUMAN antibody
      • PGHS 2 antibody
      • PGHS-2 antibody
      • PGHS2 antibody
      • PHS 2 antibody
      • PHS II antibody
      • PHS2 antibody
      • Prostaglandin endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase) antibody
      • Prostaglandin endoperoxide synthase 2 antibody
      • Prostaglandin G/H synthase 2 antibody
      • Prostaglandin G/H synthase 2 precursor antibody
      • Prostaglandin G/H synthase and cyclooxygenase antibody
      • Prostaglandin G/H synthase antibody
      • Prostaglandin H2 synthase 2 antibody
      • prostaglandin-endoperoxide synthase 2 (prostaglandin G/H synthase and cyclooxygenase) antibody
      • Prostaglandin-endoperoxide synthase 2 antibody
      • PTGS2 antibody
      • ptgs2a antibody
      • TIS10 antibody
      • TIS10 protein antibody
      • unp1239 antibody
      • wu:fj02a10 antibody
      see all


    • ab16701 at 1/100 dilution staining COX2 / Cyclooxygenase 2 in human breast carcinoma by Immunohistochemistry (FFPE-sections).


    This product has been referenced in:

    • Peng YJ  et al. Adiponectin and adiponectin receptor 1 overexpression enhance inflammatory bowel disease. J Biomed Sci 25:24 (2018). Read more (PubMed: 29540173) »
    • Szylberg L  et al. Expression of COX-2, IL-1ß, TNF-a and IL-4 in epithelium of serrated adenoma, adenoma and hyperplastic polyp. Arch Med Sci 12:172-8 (2016). Read more (PubMed: 26925134) »
    See all 4 Publications for this product

    Customer reviews and Q&As

    1-4 of 4 Abreviews or Q&A


    Unfortunately it is not possible to determine the concentration since tissue culture supernatant will contain many other host proteins besides the antibody of interest as it is unpurified. As a rough guide tissue culture supernatant contains 1 mg/ml total antibodies and 0.05 mg/ml specific antibodies.

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    BATCH NUMBER 237901 ORDER NUMBER 196732 DESCRIPTION OF THE PROBLEM There are strong bands at the wrong band sizes (see attached file). SAMPLE Rat liver hepatoma, H4IIE-cells treated with TNF-alpha PRIMARY ANTIBODY abcam, ab16701-500 Rabbit monoclonal [SP21] to COX2/ Cyclooxygenase 2 diluted 1/200 in 1% milk powder in TBS-Tween incubation time: 2.5 hours at room temperature agitating wash step: 3 x 5 min with TBS-Tween DETECTION METHOD ECL, substrate and peroxide buffer from tebu-bio : Chemiluminescent Sensitive HRP Substrate Kit (SuperDetect);2-Component Chemiluminescent Substrate for the Detection of Horseradish Peroxidase. Detection with Lumi-Imager from Roche (Lumi-Analyst Software) or X-ray films. ANTIBODY STORAGE CONDITIONS +4°C in storage buffer (data sheet) SAMPLE PREPARATION H4IIE-cells were treated with different concentrations of TNF-alpha for 6 hours. Incubation scheme: 1 000 000 cells per 60 mm petri dish were sowed in DMEM low glucose containing 10% BSA and 1% P/S and left to adhere for 24 hours at 37 °C. Then the culture medium was evacuated and the cells were washed with 0,9 % sodium chloride. Then The cells were incubated with 10, 30, 50 or 70 ng/ml TNF-alpha (dissolved in culture medium) for 6 hours. After 6 hours the incubation medium was evacuated and the cells were washed three times with 0,9 % sodium chloride. Then the cells were incubated with culture medium for another 24 hours. After 24 hours the medium was evacuated and cells were washed with 0,9 % sodium chloride. Cell lysis has been carried out by harvesting the cells with 70 µl RIPA-Lysis-buffer per 60 mm dish (50 mM Tris/HCl pH 7.4, 150 mM NaCl, 1 mM PMSF, 1 mM EDTA, 1% Triton X-100, 1 % sodium deoxycholate, 0,1 % SDS, 50 µl Protease Inhibitor Cocktail from sigma). Cell suspension was then incubated for 15 min on ice with gentle agitation and centrifugated for 15 min with 14 000 x g at 4 °C. Supernatant was evacuated and stored at -80°C until protein determination by Bradford Assay.Samples were diluted with RIPA-buffer to 4 µg/µl total protein. From this solution 12 µl were diluted with 6 µl Laemmli buffer (3x) and heated up to 95 °C for 5-6 min. The samples were pulsed and loaded onto the gel. AMOUNT OF PROTEIN LOADED 48 µg total protein per lane, protein determined by Bradford Assay ELECTROPHORESIS/GEL CONDITIONS stacking: 4 % SDS-polyacrylamidgel separating/resolving: 10% SDS-polyacrylamidgel buffer: 2 M glycine, 250 mM Tris, 1 % SDS run: 70 V for 15 min, 100 V for 1 h 40 min TRANSFER AND BLOCKING CONDITIONS discontinuous buffer system: anode buffer I : 300 mM Tris, 10 % methanol, pH 10.4 anode buffer II: 25 mM Tris, 10 % methanol, pH 10.4 cathode buffer: 40 mM glycine, 25 mM Tris, 10 % methanol, SDS, pH 9.4 time period: 1 h 25 min at 90 mA per membrane PVDF membrane (Millipore) blocking conditions: 1 h at room temperature with 5 % milk powder in TBS wash step after blocking: 3 x 5 min with TBS-Tween SECONDARY ANTIBODY [another company]./ goat anti rabbit HRP-linked diluted 1/1000 in 1 % milk powder in TBS-Tween incubation time: 1.5 hours at room temperature agitating wash step: 3 x 5 min with TBS-Tween HOW MANY TIMES HAVE YOU TRIED THE APPLICATION? 3 DO YOU OBTAIN THE SAME RESULTS EVERY TIME? Yes WHAT STEPS HAVE YOU ALTERED? washing steps reduced, electrophoresis run extended, blotting time extended, new dilution of frozen samples, ADDITIONAL NOTES The attached file shows the last western blot. Loaded samples: H4IIE-Lysate (as described above) from left to right: 10, 30, 50, 70 ng/ml TNF-alpha incubation (6h); 48 µg total protein per lane. Two different times of exposition (30 sec and 300 sec) . Detected with chemiluminescence substrate from tebu-bio and Lumi-Imager (Roche).

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    I'm very sorry to hear you are experiencing problems with ab16701. The protocol you have used is very good and should work well; in light of your problems it is clear that the antibody did not work well in western blotting. I would like to offer you a refund or credit note on your order, or another anti COX2 antibody of the same value as ab16701. Could you please tell me which you would prefer and I will arrange this immediately, I look forward to hearing from you to arrange this,

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    Thank you for your enquiry. I am not sure that I follow your question, please can you elaborate. ab16701, anti-COX2 recognizes both the rat COX2 (69164KDa) and the human COX2 (68996KDa). I hope this information helps. Please do not hesitate to contact me should you require further assistance.

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    Our source for this antibody has recommended HT 29 lysate as a positive control for Western blotting. This type of lysate can be obtained from Abcam; it is catalog # ab3952. If you have any additional questions, please contact us again.

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