• Nature
  • Amino Acid Sequence
    • Species

Associated products


Our Abpromise guarantee covers the use of ab46181 in the following tested applications.

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

  • Applications

    Blocking - Blocking peptide for Anti-Aquaporin 4 antibody (ab46182)

  • Form
  • Additional notes

    - First try to dissolve a small amount of peptide in either water or buffer. The more charged residues on a peptide, the more soluble it is in aqueous solutions.
    - If the peptide doesn’t dissolve try an organic solvent e.g. DMSO, then dilute using water or buffer.
    - Consider that any solvent used must be compatible with your assay. If a peptide does not dissolve and you need to recover it, lyophilise to remove the solvent.
    - Gentle warming and sonication can effectively aid peptide solubilisation. If the solution is cloudy or has gelled the peptide may be in suspension rather than solubilised.
    - Peptides containing cysteine are easily oxidised, so should be prepared in solution just prior to use.

  • Concentration information loading...

Preparation and Storage

  • Stability and Storage

    Shipped at 4°C. Upon delivery aliquot and store at -20°C or -80°C. Avoid repeated freeze / thaw cycles.

    Information available upon request.

General Info

  • Alternative names
    • AQP 4
    • AQP-4
    • AQP4
    • AQP4_HUMAN
    • Aquaporin type 4
    • Aquaporin-4
    • Aquaporin4
    • HMIWC 2
    • HMIWC2
    • Mercurial insensitive water channel
    • Mercurial-insensitive water channel
    • MGC22454
    • MIWC
    • WCH 4
    • WCH4
    see all
  • Function
    Forms a water-specific channel. Osmoreceptor which regulates body water balance and mediates water flow within the central nervous system.
  • Tissue specificity
    Brain - muscle >> heart, kidney, lung, and trachea.
  • Sequence similarities
    Belongs to the MIP/aquaporin (TC 1.A.8) family.
  • Domain
    Aquaporins contain two tandem repeats each containing three membrane-spanning domains and a pore-forming loop with the signature motif Asn-Pro-Ala (NPA).
  • Post-translational
    Phosphorylation by PKC at Ser-180 reduces conductance by 50%. Phosphorylation by PKG at Ser-111 in response to glutamats increases conductance by 40%.
  • Cellular localization
  • Information by UniProt


This product has been referenced in:
See 1 Publication for this product

Customer reviews and Q&As

1-2 of 2 Abreviews or Q&A


Thank you for contacting us.

We realize that our products can be considered to have premium price point. However, we feel that the product and service which we offer are of the highest possible quality. Under our Abpromise guarantee, ourproducts are guaranteed to work in the manner stated on the datasheetfor a period of six months. If you experience any difficulties using our product and if you have purchased this product within the last 180 days, we are happy to provide scientific support, refund or replacement.

We do offer bulk discounts for orders of 10 units or more, and often run promotions for a number of product types. Please see our website or speak with customer service representative for more information about these.

I hope that this information is helpful. Please let me know if you have any questions or there are other ways that Abcam may help you meet your research goals.

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Thank you for contacting us. I am glad to hear that this replacement product is performing better than the last product.

Many factors can alter the predicted molecular weight of a protein. These may include post-translational modifications, protein processing, isoforms from alternative splicing, multimer formation, and amino acid charge.

Non-specific binding of an antibody to proteins other than the antigen can sometimes occur. This is usually more common with polyclonal antibodies, but can also occur with monoclonals as well.

An immunizing peptide blocking experiment can be performed to determine which band or staining is specific. As you have mentioned, this product's immunogen is available for use as a blocking peptide. I would recommend using this if you are concerned about the specificity of this product.

In case you would like more information regarding the use of blocking peptides, I have included Abcam's protocol for blocking with the immunizing peptide.

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

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