• Product name

    Anti-KCNMB3 antibody [EPR9543(B)]
    See all KCNMB3 primary antibodies
  • Description

    Rabbit monoclonal [EPR9543(B)] to KCNMB3
  • Host species

  • Tested applications

    Suitable for: Flow Cyt, WBmore details
    Unsuitable for: ICC/IF,IHC-P or IP
  • Species reactivity

    Reacts with: Mouse, Rat, Human
  • Immunogen

    Synthetic peptide corresponding to residues within the intracellular domain of Human KCNMB3 (UniProt ID: Q9NPA1)

  • Positive control

    • BxPC3, HepG2, C6, RAW 264.7, PC12 and NIH 3T3 cell lysates; HeLa cells
  • General notes



    Our RabMAb® technology is a patented hybridoma-based technology for making rabbit monoclonal antibodies. For details on our patents, please refer to RabMab® patents.

    This product is a recombinant rabbit monoclonal antibody.



Our Abpromise guarantee covers the use of ab137041 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
Flow Cyt 1/10 - 1/100.

ab172730 - Rabbit monoclonal IgG, is suitable for use as an isotype control with this antibody.


WB 1/1000 - 1/10000. Detects a band of approximately 29 - 32 kDa (predicted molecular weight: 32 kDa).
  • Application notes
    Is unsuitable for ICC/IF,IHC-P or IP.
  • Target

    • Function

      Regulatory subunit of the calcium activated potassium KCNMA1 (maxiK) channel. Modulates the calcium sensitivity and gating kinetics of KCNMA1, thereby contributing to KCNMA1 channel diversity. Alters the functional properties of the current expressed by the KCNMA1 channel. Isoform 2, isoform 3 and isoform 4 partially inactivate the current of KCNBMA. Isoform 4 induces a fast and incomplete inactivation of KCNMA1 channel that is detectable only at large depolarizations. In contrast, isoform 1 does not induce detectable inactivation of KCNMA1. Two or more subunits of KCNMB3 are required to block the KCNMA1 tetramer.
    • Tissue specificity

      Isoform 1, isoform 3 and isoform 4 are widely expressed. Isoform 2 is expressed placenta, pancreas, kidney and heart. Isoform 1 and isoform 3 are highly expressed in pancreas and testis.
    • Sequence similarities

      Belongs to the KCNMB (TC 8.A.14.1) family. KCNMB3 subfamily.
    • Domain

      Isoform 4 cytoplasmic N-terminal domain participates in the partial inactivation of KCNMA1, possibly by binding to a receptor site.
      The extracellular domain forms gates to block ion permeation, providing a mechanism by which current can be rapidly diminished upon cellular repolarization.
    • Post-translational

      The extracellular domain contains disulfide bond essential for the gating mechanism.
    • Cellular localization

    • Information by UniProt
    • Database links

    • Alternative names

      • BK channel subunit beta 3 antibody
      • BK channel subunit beta-3 antibody
      • BKbeta 3 antibody
      • BKbeta3 antibody
      • Calcium activated potassium channel beta 3 subunit antibody
      • Calcium activated potassium channel subfamily M subunit beta 3 antibody
      • Calcium activated potassium channel subunit beta 3 antibody
      • Calcium-activated potassium channel antibody
      • Calcium-activated potassium channel subunit beta-3 antibody
      • Charybdotoxin receptor subunit beta 3 antibody
      • Charybdotoxin receptor subunit beta-3 antibody
      • EG435726 antibody
      • Gm5707 antibody
      • Hbeta 3 antibody
      • Hbeta3 antibody
      • K(VCA)beta 3 antibody
      • K(VCA)beta-3 antibody
      • KCMB3_HUMAN antibody
      • KCNMB 2 antibody
      • KCNMB 3 antibody
      • KCNMB2 antibody
      • KCNMB3 antibody
      • KCNMBL antibody
      • Large conductance voltage and Ca2+ activated potassium channel Maxi K beta 3 subunit antibody
      • Maxi K channel subunit beta 3 antibody
      • Maxi K channel subunit beta-3 antibody
      • Potassium channel, calcium-activated large conductance, subfamily M, beta member 3 antibody
      • Potassium large conductance calcium activated channel beta 3 subunit antibody
      • Potassium large conductance calcium activated channel subfamily M beta member 3 antibody
      • Slo beta 3 antibody
      • Slo-beta-3 antibody
      • subfamily M subunit beta-3 antibody
      see all


    • All lanes : Anti-KCNMB3 antibody [EPR9543(B)] (ab137041) at 1/1000 dilution

      Lane 1 : BxPC3 cell lysate
      Lane 2 : HepG2 cell lysate
      Lane 3 : HeLa cell lysate
      Lane 4 : C6 cell lysate
      Lane 5 : RAW 264.7 cell lysate
      Lane 6 : PC12 cell lysate
      Lane 7 : NIH 3T3 cell lysate

      Lysates/proteins at 10 µg per lane.

      All lanes : HRP conjugated Goat anti Rabbit IgG at 1/2000 dilution

      Predicted band size: 32 kDa

    • Flow cytometry analysis of permeabilized Hela cells labelling KCNMB3 with ab137041 at 1/10 dilution (Red) or a Rabbit IgG (negative control) (Green).


    This product has been referenced in:

    • Zaidman NA  et al. Large-conductance Ca(2+) -activated K(+) channel activation by apical P2Y receptor agonists requires hydrocortisone in differentiated airway epithelium. J Physiol 595:4631-4645 (2017). Read more (PubMed: 28481415) »
    • Petho Z  et al. Different expression of ß subunits of the KCa1.1 channel by invasive and non-invasive human fibroblast-like synoviocytes. Arthritis Res Ther 18:103 (2016). Read more (PubMed: 27165430) »
    See all 2 Publications for this product

    Customer reviews and Q&As

    There are currently no Customer reviews or Questions for ab137041.
    Please use the links above to contact us or submit feedback about this product.

    For licensing inquiries, please contact partnerships@abcam.com

    Sign up