• Product name
    Anti-COX2 / Cyclooxygenase 2 antibody
    See all COX2 / Cyclooxygenase 2 primary antibodies
  • Description
    Rabbit polyclonal to COX2 / Cyclooxygenase 2
  • Host species
  • Tested applications
    Suitable for: IHC-Fr, ICC/IF, Sandwich ELISA, IP, IHC-P, WBmore details
  • Species reactivity
    Reacts with: Mouse, Rat, Human, Syrian hamster
  • Immunogen

    Synthetic peptide within Rat COX2/ Cyclooxygenase 2 aa 550 to the C-terminus (C terminal). The exact sequence is proprietary.
    Database link: P35355

  • Positive control
    • IHC-P: Mouse brain, Rat hippocampus, and Human breast carcinoma tissues; IHC-Fr: Mouse aorta ateriosclerotic plaque, Mouse liver, and Human colorectal tumor tissues; ICC/IF: HepG2 cells;


Our Abpromise guarantee covers the use of ab15191 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 1/100.
ICC/IF Use at an assay dependent concentration. PubMed: 20660112
Sandwich ELISA Use a concentration of 0.5 µg/ml. Can be paired for Sandwich ELISA with Mouse monoclonal [AS66] to COX2 / Cyclooxygenase 2 (ab90345).

For sandwich ELISA, use this antibody as Detection at 0.5µg/ml with ab90345 as Capture.

IP Use at an assay dependent concentration.
IHC-P 1/100.
WB Use at an assay dependent concentration. Detects a band of approximately 69 kDa.


  • 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


  • All lanes : Anti-COX2 / Cyclooxygenase 2 antibody (ab15191) at 1 µg/ml

    Lane 1 : Recombinant human COX2 / Cyclooxygenase 2 protein (ab58868) at 0.1 µg
    Lane 2 : Recombinant human COX2 / Cyclooxygenase 2 protein (ab58868) at 0.01 µg

    All lanes : Goat Anti-Rabbit IgG H&L (HRP) preadsorbed (ab97080) at 1/5000 dilution

    Developed using the ECL technique.

    Performed under reducing conditions.

    Exposure time: 10 seconds
  • ab15191 staining COX2 in HepG2 cells treated with sinomenine hydrochloride (ab141190), by ICC/IF. Decrease of COX2 expression correlates with increased concentration of sinomenine hydrochloride, as described in literature.
    The cells were incubated at 37°C for 48 hours in media containing different concentrations of ab141190 (sinomenine hydrochloride) in DMSO, fixed with 4% formaldehyde for 10 minutes at room temperature and blocked with PBS containing 10% goat serum, 0.3 M glycine, 1% BSA and 0.1% tween for 2h at room temperature. Staining of the treated cells with ab15191 (5 μg/ml) was performed overnight at 4°C in PBS containing 1% BSA and 0.1% tween. A DyLight 488 anti-rabbit polyclonal antibody (ab96899) at 1/250 dilution was used as the secondary antibody. Nuclei were counterstained with DAPI and are shown in blue.
  • ab15191 staining mouse brain sections by IHC-P.  Sections were formaldehyde fixed and subjected to heat mediated antigen retrieval in citrate buffer prior to blocking with 1% BSA for 10 minutes at RT.  The primary antibody was diluted 1/2000 and incubated with the sample for 2 hours.  A biotinylated goat anti-rabbit IgG antibody, diluted 1/300, was used as the secondary. Sections were preblocked in an Avidin-Biotin kit to mask endogenous biotin

    See Abreview

  • Standard Curve for COX2 / Cyclooxygenase 2 (Analyte: ab58868) dilution range 1pg/ml to 1ug/ml using Capture Antibody Mouse monoclonal [AS66] to COX2 / Cyclooxygenase 2 (ab90345) at 1ug/ml and Detector Antibody Rabbit polyclonal to COX2 / Cyclooxygenase 2 (ab15191) at 0.5ug/ml
  • ab15191 staining COX2 in Human Colorectal Tumor tissue sections by Immunohistochemistry (IHC-Fr - frozen sections). Tissue was fixed with paraformaldehyde, permeabilized with 0.3% Triton and blocked with 5% serum for 1 hour at 24°C. Samples were incubated with primary antibody (1/500 in PBS + 0.3% Triton + 0.1% BSA) for 2 hours at 24°C. An Alexa Fluor® 488-conjugated Goat anti-rabbit polyclonal (1/1000) was used as the secondary antibody.

    See Abreview

  • ab15191 staining adult rat hippocampus tissue sections by IHC-P.  Sections were formaldehyde fixed and subjected to heat mediated antigen retrieval (in citric acid, pH6, 10mM) prior to blocking in 1% BSA for 10 minutes at RT.  The primary anitbody was diluted 1/400 and incubated with the sample for 2 hours.  A biotinylated goat anti-rabbit antibody, diluted 1/300 was used as the secondary.

    Clear cytoplasmic staining in a subset of neurones in the dentate gyrus of a sagittal section of whole rat brain can be seen.  In other areas of this section, there are, additionally, small cells and their processes that are positive: they may be inter-neurones or microglia: it would be neccessary to carry out double-immunostaining to confirm this.

    See Abreview

  • ab15191 staining tissue sections of arteriosclerotic plaque in mouse aorta by IHC-Fr.  Sections were acetone fixed and blocked in 1% serum for 10 minutes at 20°C prior to incubation with the primary antibody (diluted 1/500) for 1 hour at 20°C.  A biotinylated donkey anti-rabbit antibody (diluted 1/500) was used as the secondary.

    See Abreview

  • ab15191 staining COX2 / Cyclooxygenase in human breast carcinoma by Immunohistochemistry (FFPE-sections).

  • ab15191 staining COX2 / Cyclooxygenase 2 in Mouse liver tissue sections by IHC-Fr.

    Cells were fixed with acetone and blocked with 10% Serum for 60 minutes at 22°C. Samples were incubated with primary antibody (1/200 in PBS + 0.1% Triton x-100) for 13 hour at 4°C. An Alexa Fluor®488-conjugated Goat anti-rabbit IgG polyclonal(1/1000) was used as the secondary antibody.

    See Abreview


This product has been referenced in:
  • Soliman NA  et al. The possible ameliorative effect of simvastatin versus sulfasalazine on acetic acid induced ulcerative colitis in adult rats. Chem Biol Interact 298:57-65 (2019). Read more (PubMed: 30408459) »
  • Liu LM  et al. Edaravone acts as a potential therapeutic drug against pentylenetetrazole-induced epilepsy in male albino rats by downregulating cyclooxygenase-II. Brain Behav 9:e01156 (2019). Read more (PubMed: 30506635) »
See all 125 Publications for this product

Customer reviews and Q&As

1-10 of 20 Q&A


It is hard to tell where the expected band would be without the molecular weight ladder labeled. Additionally, the high background present in the gel is taking away from our ability to detect fainter bands that may be present. Thus, I recommend increased washing under agitation on a shaker, as well as including agitation during your blocking step to better block the membrane prior to primary antibody incubation.

Our comprehensive western blot guide is given through the link below:

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We recently discussed the very faint positive band you've been seeing with ab15191 in your mouse lung homogenate hyperoxia samples along with high background in the gel. After reviewing other researchers' western blot images posted on our website for this antibody under "AbReviews," it seems that you can expect some non-specific bands with this antibody when used with tissue samples. For a general dark background throughout the gel, I suggest increasing the number of washes between each antibody incubation and running a secondary only control lane to determine if the secondary is reacting with the blocking reagent or gel.

Additionally, other researchers have observed success using ab15191 at a dilution of 1/500 and we validated the antibody in western blot at a dilution of 1/200, so I recommend increasing your primary concentration. I also recommend adding protease inhibitors to your sample buffer if you have not done so already since lower molecular weight bands may be explained by protein digestion.

A link to our suggested troubleshooting tips is given below:

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Thank you for contacting Abcam.

I would recommend ab15191, as we guarantee it to work on mouse samples in IHC-Frozen samples and we have a number of Abreviews and references that have successfully used this antibody.

Also, this month Abcam has a promotion whereby, if you purchase 1 none rabbit monoclonal antibody at full price, you can receive a free RabMab (rabbit monoclonal) free of charge. Details of which can be found at the link below:


If there is anything else I can help you with, please let me know.

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Expiration date: March 2nd, 2013
Value: ***

I am very pleased to hear you would like to accept our offer and test ab15191 in IHC-FoFr. This code will give you *** off your next order before the expiration date. To redeem this offer, please submit an Abreview for IHC-FoFr and include this code in the “Additional Comments” section so we know the Abreview is for this promotion. Please remember that submission of the Abreview is sufficient for the discount code to become active.
For more information on how to submit an Abreview, please visit the site: https://www.abcam.com/Abreviews.

Remember, we publish both positive and negative Abreviews on our datasheets so please submit the results of your tests. The code will be active once the Abreview has been submitted and can be redeemed in one of the following ways: 1) Call to place your order and mention the code to our customer service department; 2) Include the code in your fax order; 3) Place your order on the web and enter the promotional code.

Any feedback that you can provide will be greatly appreciated, whether positive or negative. If you have any further questions, please do not hesitate to contact us. We look forward to receiving your Abreview and wish you luck with your research.

The terms and conditions applicable to this offer can be found here: www.abcam.com/abtrial.

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Thank you for your inquiry.

It is interesting that the rat brain whole cell lysate isn't showing bands for COX2. Swiss Prot says that the protein is expressed throughout the forebrain in discrete populations of neurons and is enriched in the cortex and hippocampus. Perhaps that lysate doesn't have a high concentration of these areas. I am happy to hear that the BCL2 and beta actin antibodies can pick it up though.

As an alternative, it looks as though rat kidney lysate has been used with ab15191 a few times.



We sell that as ab29480. https://www.abcam.com/Kidney-Rat-Whole-Cell-Lysate-normal-tissue-ab29480.html

I hope this information helps. Please contact us with any other questions.

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Thank you for contacting us. Since you are testing in rat you could consider rat brain or kidney whole cell lysate as a positive control for Cox2 and b-actin. We do have a number of antibody choices for your targets, but two popular antibodies for Bcl2 that have both reviews and publications are ab7973 and ab59348. For p27 you could look at ab3928 and ab7961. All of our antibodies are guaranteed to work in the species and applications listed on the datasheet or we will replace, refund, or credit you for themprovided it iswithin 6 months of purchase.

I hope this information is helpful to you. Please do not hesitate to contact us if you need any more advice or information.

Use our products? Submit an Abreview. Earn rewards!

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Thank you for liaising with the customer and providing the complete set of information, including all the images. We do appreciate your support very much.

I am sorry to hear this antibody is not providing satisfactory results.

The details the customer provided will enable us to investigate this case and will provide us with vital information for monitoring product quality. I can reassure you, that for the moment we have no reason to believe that there would bea general problem with this antibody. However having reviewed the protocol details, I believe thisproduct should have given satisfactory results. It appearsthat the customermay has received a faulty vial.

I apologize for the inconvenience and am pleased to offer him eithera free of charge replacement or a credit note.Please do let me know what option the customer does prefer. I can also offer an alternative antibody as a free of charge replacement. Please provide also the order number on which the original vial of ab15191 has been ordered.

Thank you for your cooperation. I look forward to hearing from you with details of how you would like to proceed.

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Thank you for contacting us.

I am sorry that this antibody did not perform as stated on the datasheet. I have asked our accounting department to issue a credit note for you, which can be redeemed against the invoice of a future order by passing it on to your purchasing department. To avoid confusion, please ensure your accounts department is aware of how the credit note is being used. If you have questions on how to use the credit note, please contact our accounting department.

Our accounting department can be contacted by email at us.credits@abcam.com or by telephone using the information at the Contact Us link in the top right corner of our website. Please refer to the credit note ID in any correspondence with our accounting department.

The credit note ID is for your reference only and does not automatically guarantee the credit.

I hope this experience will not prevent you from purchasing other products from us in the future. Our Scientific Support team is always at your service, should you require further expert advice.

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Thanks for sending along the western blot.

You might be detecting a specific band in there but I agree there are too many non specific bands to be certain. Because of this high background I'm happy to offer a replacement, credit or refund if you have received this vial of ab15191 within the last 6 months or so.

In your reply, please include your order reference number or PO number so I can priocess your request.

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Thank you for contacting us.

I just received an email form the lab."Unfortunately we do not have the peptide for ab15191available for sale."

As the sequence is propriety as well, I cannot give you this either. However, one possibility maybe the closest thing: to use the COX2 / Cyclooxygenase 2full length protein. Unfortunately, we do not sell this either.

I am really sorry that I cannot help you in this case, but maybe it would be worth checking out the Biocompare website, as they have a big catalog as well.

I hope this information is nonethelesshelpful to you. Please do not hesitate to contact us if you need any more advice or information.

Use our products? Submit an Abreview. Earn rewards!

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1-10 of 20 Q&A


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