• Form
  • Storage instructions
    Store at room temperature.
  • Storage buffer
    pH: 6.00
    Constituent: Citrate Buffer
    Note: Buffer x10 concentrated.
  • Concentration information loading...
  • Research areas
  • Relevance
    Citrate buffer is used on formalin-fixed, paraffin-embedded tissue sections mounted on glass slides for target retrieval prior to immunohistochemistry (IHC) procedures. Target retrieval prior to IHC procedures obtains positive results, or results in an increase in staining intensity with many primary antibodies.


Our Abpromise guarantee covers the use of ab64214 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-P Use at an assay dependent dilution.


  • Immunohistochemical analysis of mouse lung. Samples were fixed in 10% buffered formalin, paraffinized and sliced at 1.5 µm thick. Antigen retrieval was performed using ab64214 for the deparaffinized slices. Sections were blocked with 2% normal goat serum, PBS(-) and 0.1% Tween20. They were then incubated with the primary antibodies for 1 hour at 4°C and with secondary antibodies for 30 minutes at room temperature. The avidin-biotin-peroxidase complex method with peroxidase streptavidin and the DAB substrate kit ab64238 was performed.

    (A) A resected lung from a mouse sacrificed 28 days after SCL injection.

    (B) Haemotoxylin and Eosin staining showing the tumor composed of a central area with necrosis and a peripheral zone filled with SCLs.

    (C) Immunohistochemical staining for MMP-14 showing positive expression of MMP-14 in the peripheral zone of the tumor and negative in central zone.

    (D) Immunohistochemical staining weak staining of MMP-2 in the peripheral zone. 




  • Immunohistochemical analysis of liver tissue section labeling PCNA with ab18197 at 1/250. Antigen retrieval was performed with antigen retrieval buffer, ab64236. A and B, PCNA staining in right and left grafts 1 day after reperfusion. E and F, PCNA staining in right and left grafts 5 day after reperfusion.

    This image was produced using ab64236 (a higher concentration of ab64214 ). Therefore, we expect ab64214 to work as well when diluted to the required concentration. 



This product has been referenced in:
  • Dzidziguri D  et al. Determination of The Properties of Rat Brain Thermostable Protein Complex which Inhibit Cell Proliferation. Cell J 19:552-558 (2018). Read more (PubMed: 29105389) »
  • Celebi AR  et al. Evaluation of the 'Hedgehog' signaling pathways in squamous and basal cell carcinomas of the eyelids and conjunctiva. Oncol Lett 12:467-472 (2016). Read more (PubMed: 27347166) »

See all 5 Publications for this product

Customer reviews and Q&As

Thank you for your reply.

Your protocol seems comprehensive, although I would strongly recommend including the antigen retrieval step since this has worked well for other customers. We would recommend citrate buffer pH 6, which we do sell as ...

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Thank you for contacting us.

Here is the list with the requested items. However, please be aware that this is not a technical inquiry as all item could be found by using the search application on our website under the "reagents" ca...

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Thank you for contacting us.

We do not currently offer double staining IHC kits. Your staining conditions are challenging as, of the two common HRP chromogens, only DAB is alcohol insoluable. While of the common AP chromagens, only BCIP/NBT ...

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Thank you for your recent telephone enquiry. I can confirm that the concentration of citrate in the buffer is 30 mM. I hope this will be helpful to you. Should you have any further questions, please do not hesitate to contact us. Good lu...

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Thank you for your enquiry. Unfortunately, the concentration of 10 X citrate buffer is proprietary and can not be released. However, we can suggest that you make a ten times dilution of the buffer for the antigen retrieval. Simple take 1ml of this ...

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