Associated products


Our Abpromise guarantee covers the use of ab64746 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
ICC 1/500.
IHC-Fr 1/500.


  • Function

    Inhibits neurotransmitter release by reducing calcium ion currents and increasing potassium ion conductance. Receptor for beta-endorphin.
  • Sequence similarities

    Belongs to the G-protein coupled receptor 1 family.
  • Cellular localization

    Cell membrane.
  • Information by UniProt
  • Database links

  • Alternative names

    • hMOP antibody
    • LMOR antibody
    • M-OR-1 antibody
    • MOP antibody
    • MOR antibody
    • MOR-1 antibody
    • MOR1 antibody
    • Mu opiate receptor antibody
    • Mu opioid receptor antibody
    • Mu-type opioid receptor antibody
    • Opioid receptor mu 1 antibody
    • OPRM antibody
    • OPRM_HUMAN antibody
    • OPRM1 antibody
    see all


  • Ab64746 (1:500) staining of Mu opioid receptor in rat dorsal horn by IHC.


This product has been referenced in:

  • Mambretti EM  et al. Functional and structural characterization of axonal opioid receptors as targets for analgesia. Mol Pain 12:N/A (2016). Read more (PubMed: 27030709) »
See 1 Publication for this product

Customer reviews and Q&As

1-4 of 4 Abreviews or Q&A


Gracias por contactarnos.
Después de consultar este caso con mis compañeros del laboratorio, acerca de los siguientes anticuerpos contra Mu Opioid Receptor validados en tejidos de rata: ab10275, ab17934, ab64746, ab128013 y ab134054, me temo que ninguno de ellos ha demostrado reconocer el epítopo extracelular de la proteína.
Todos ellos se han generado a partir del extremo C terminal de la proteína, por lo que, a pesar de no haberse mapeado el epítopo que reconocen, probablemente detecten el dominio citoplásmico de la misma.
La solución que te propongo es testar uno de los anticuerpos que hay en el catálogo hecho a partir del extremo N terminal de la proteína, y testarlo en rata. Tenemos en abcam un sistema de evaluación de anticuerpos por el cual al testar uno de ellos en una aplicación o especie que no se ha testado, puedes beneficiarte de un descuento en tu próxima compra por valor del anticuerpo, si lo usas en esa especie o aplicación nueva y nos mandas los resultados a la web en forma de Abreview.
Para saber más sobre este sistema: www.abcam.com/abtrial
De las posibles alternativas, ab140911, ab137460 o ab137277 indícame si quieres cuál os interesaría más, para averiguar su homología con la proteína en rata y determinar la posibilidad de reaccionar en esta especie, en caso de que queráis participar en el sistema Abtrial.
Espero haberte ayudado. No dudes en contactarnos de nuevo para cualquier otra consulta.

Read More
Immunohistochemistry (PFA perfusion fixed frozen sections)
Mouse Tissue sections (dorsal root ganglia, spinal cord)
Antigen retrieval step
Yes - triton
dorsal root ganglia, spinal cord
Blocking step
BSA as blocking agent for 2 hour(s) and 0 minute(s) · Concentration: 3% · Temperature: 23°C

Amanda Klein

Verified customer

Submitted Nov 24 2015


Thank you very much for confirming this.

I very much appreciate the time the customer has spent in the lab trying tooptimise the results and Iam sorry to hear that the suggestions did not help to significantly improve the outcome.

Would the customer still like to receive a credit note, or can we offer any other primary antibody as a free of charge replacement?

Thank you very much for your cooperation in this case.

Have a great day!

Read More


Thank you for taking the time to complete our questionnaire and contact us. I am sorry to hear the customer has repeatedly had difficulty obtaining satisfactory results from this antibody.

I appreciate the time spent in the laboratory and understand the concerns. It is regrettable the results have not been successful.

Having investigated and discussed this case with our immunohistochemistry experts, we figured out that the fixation of the fresh frozen mouse brain tissue sections might be the crucial step:

As indicated by the customer, a fixation with 4% PFA for 30 min at room temperature is performed. This step certainly results in the formation of methylene bridges, which cross-link proteins and therefore mask antigenic sites. PFA-fixed tissues thus require an antigen retrieval step before immunohistochemical staining can proceed. However, this procedure is rather unsuitable for delicate frozen brain sections, and we therefore recommend fixation with solvents like acetone, methanol or ethanol. The fixative should be pre-cooled and fixation carried out for 5-10 min at room temperature. Please find attached a more detailed protocol which can also be found here: https://www.abcam.com/index.html?pageconfig=resource&rid=11383). We believe optimising this fixation step would improve the results significantly for both ab10275 and ab64746.

If this suggestion has not been tried already, we would appreciate if the customer can consider trying the optimisation. I hope you would agree that it would be preferable if we can get the experiment working and giving good results. Should the suggestion not improve the results, again we will be pleased to arrange an immediate credit note as requested.

I hope this information is helpful, thank you for your cooperation.

Read More

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