• Product name

  • Description

    Rabbit polyclonal to VDAC1/Porin
  • Host species

  • Specificity

    Cross reactivity will occur with all forms of VDACs including VDAC1, VDAC2 (4 isoforms) and VDAC3(2 isoforms). This broad reactivity makes ab34726 useful as a loading control (mitochondrial).
  • Tested applications

    Suitable for: ELISA, WB, IHC-P, ICC/IFmore details
  • Species reactivity

    Reacts with: Rat, Human
    Predicted to work with: Mouse, Rabbit, Cow, Pig, Zebrafish
  • Immunogen

    Synthetic peptide corresponding to Human VDAC1/Porin aa 185-197.


  • Positive control

    • WB: rat heart whole cell lysate.



Our Abpromise guarantee covers the use of ab34726 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
ELISA 1/10000 - 1/50000.
WB 1/500 - 1/3000. Detects a band of approximately 32 kDa (predicted molecular weight: 31 kDa).
IHC-P Use a concentration of 5 µg/ml. Perform heat mediated antigen retrieval with citrate buffer pH 6 before commencing with IHC staining protocol.
ICC/IF 1/100.

Fixation with PFA requires a denaturing step, see Abreview by M.Schrader.


  • Function

    Forms a channel through the mitochondrial outer membrane and also the plasma membrane. The channel at the outer mitochondrial membrane allows diffusion of small hydrophilic molecules; in the plasma membrane it is involved in cell volume regulation and apoptosis. It adopts an open conformation at low or zero membrane potential and a closed conformation at potentials above 30-40 mV. The open state has a weak anion selectivity whereas the closed state is cation-selective. May participate in the formation of the permeability transition pore complex (PTPC) responsible for the release of mitochondrial products that triggers apoptosis.
  • Tissue specificity

    Heart, liver and skeletal muscle.
  • Sequence similarities

    Belongs to the eukaryotic mitochondrial porin family.
  • Domain

    Consists mainly of a membrane-spanning beta-barrel formed by 19 beta-strands. The helical N-terminus folds back into the pore opening and plays a role in voltage-gated channel activity.
  • Cellular localization

    Mitochondrion outer membrane. Cell membrane.
  • Information by UniProt
  • Database links

  • Alternative names

    • N2441 antibody
    • OMP2 antibody
    • POR1 antibody
    • hVDAC1 antibody
    • MGC111064 antibody
    • Mitochondrial Porin antibody
    • Outer mitochondrial membrane protein porin 1 antibody
    • Plasmalemmal porin antibody
    • Porin 31HL antibody
    • Porin 31HM antibody
    • VDAC antibody
    • VDAC-1 antibody
    • Vdac1 antibody
    • VDAC1_HUMAN antibody
    • Voltage dependent anion channel 1 antibody
    • Voltage dependent anion selective channel protein 1 antibody
    • Voltage-dependent anion-selective channel protein 1 antibody
    • YNL055C antibody
    • YNL2441C antibody
    see all


  • IHC image of ab34726 staining in human liver formalin fixed paraffin embedded tissue section, performed on a Leica BondTM system using the standard protocol F. The section was pre-treated using heat mediated antigen retrieval with sodium citrate buffer (pH6, epitope retrieval solution 1) for 20 mins. The section was then incubated with ab34726, 5µg/ml, for 15 mins at room temperature and detected using an HRP conjugated compact polymer system. DAB was used as the chromogen. The section was then counterstained with haematoxylin and mounted with DPX.

    For other IHC staining systems (automated and non-automated) customers should optimize variable parameters such as antigen retrieval conditions, primary antibody concentration and antibody incubation times.

  • ab34726 at a 1/100 dilution staining VDAC1/Porin in COS7 cells by Immunocytochemistry/ Immunofluorescence.The antibody does not work with a standard fixation for ICC/IF as it does not recognize the non-denatured protein. However, applying a fixation for hidden antigens (modified from Peränen J, Rikkonen M, Kääriäinen L. A method for exposing hidden antigenic sites in paraformaldehyde-fixed cultured cells, applied to initially unreactive antibodies. J Histochem Cytochem. 1993 Mar41(3):447-54) results in very good recognition of VDAC/porin. Denaturing is achieved by Guanidine hydrochloride in 50 mM Tris-HCL pH 7.5 after fixation (3% pFA, 0.05% GA) and permeabilization (0.2% TX-100). The secondary used was a TRITC conjugated donkey anti-rabbit used at a 1/100 dilution.


This product has been referenced in:

  • Chun SK  et al. Loss of sirtuin 1 and mitofusin 2 contributes to enhanced ischemia/reperfusion injury in aged livers. Aging Cell N/A:e12761 (2018). Read more (PubMed: 29774638) »
  • Chen Z  et al. Hyperoside alleviates adriamycin-induced podocyte injury via inhibiting mitochondrial fission. Oncotarget 8:88792-88803 (2017). Read more (PubMed: 29179476) »
See all 28 Publications for this product

Customer reviews and Q&As

1-10 of 13 Abreviews or Q&A

Western blot
Ictidomys tridecemlineatus Tissue lysate - other (Liver Mitochondria)
Gel Running Conditions
Reduced Denaturing (10)
Loading amount
40 µg
Liver Mitochondria
Blocking step
BSA as blocking agent for 2 hour(s) and 0 minute(s) · Concentration: 5%

Amanda Maccannell

Verified customer

Submitted Dec 02 2016


Thank you for contacting us again.

I have issued a free of charge replacement with a different lot number, but it looks like that this vial was already on the pick list for another order. Therefore, the order is waiting to receive a vial we already have been sold and can't be fulfilled. Unfortunately, this has not been flagged up... I prologize for the delay!

Checking our stock, it looks we do not have an alternative lot. However, your complaint has been the only one so far this year. Therefore, I do not think that we have a general lot problem, but that you unfortunately, received a faulty vial. Your free of charge replacementwould be covered as well with our guarantee, so I would like to encourage you to try the same lot again.

If you would prefer instead another antibody against this target, a credit note or a refund, I am happy to issue this for you as well.

Please let me know what you prefer.

Read More


Thank you for the clarification!

I am sorry this product did not perform as stated on the datasheet and for the inconvenience this has caused. As requested, I have issued a free of charge replacement of another batchwith the order number 1164302.

To check the status of the order please contact our Customer Service team and reference this number.

Please note that this free of charge replacement vial is also covered by our Abpromise guarantee. Should you still be experiencing difficulties, or if you have any further questions, please do not hesitate to let us know.

I wish you the best of luck with your research.

Read More


Thank you for contacting us.

Although other lots of this antibody have worked well under these former conditions, all individual antibodies will require individual optimization.

According to the datasheet, 1/500 is within the recommended dilution range. It may be that this lot has a lower affinity asthe previous ones and therefore need a higher concentration. As the antibody is workingwithin the givenparameters,I am afraid I cannot send out a replacement

I hope this information is still helpful to you. Thank you for your understanding and cooperation.

Use our products? Submit an Abreview. Earn rewards!

Read More


Thank you for your reply. For broad reactivity, I would recommend our ab34726. This antibody is known to react with all forms of VDACs including VDAC1, VDAC2 (4 isoforms) and VDAC3(2 isoforms). I hope this helps, please let me know if you need any additional information or assistance.

Read More


Thank you for your enquiry.
Currently, this antibody (ab34726) is out of stock. However, the good news is that we have some alternative products against the same target protein (VDAC/Porin). I do not know in which species/application your customer would like to use the other product so please advice her/him to read the products datasheets carefully to see which one would be suitable.
- ab110326: https://www.abcam.com/vdac-porin-antibody-16g9e6bc4-ab110326.html
- ab61273: https://www.abcam.com/vdac-porin-antibody-mitochondrial-marker-ab61273.html
- ab96140: https://www.abcam.com/vdac-porin-antibody-16g9e6bc4-ab110326.html
I hope this helps and if I can assist further, please do not hesitate to contact me.

Read More


Thank you for your inquiry. VDAC1 is a mitochondrial protein and I believe its level of expression is pretty ubiquitous in all tissues, cancerous and normal. According to the Human Protein Atlas, VDAC1 is expressed in most normal and cancer tissues tested. http://www.proteinatlas.org/ENSG00000213585/normal http://www.proteinatlas.org/ENSG00000213585/cancer All anti-VDAC1/Porin antibodies in our catalogue will stain the same mitochondrial protein. The ones named "Mitochondrial Loading Control" have typically been cited in papers to have been used as such. That is really the only main difference in the name. I hope this information helps. Please contact us with any other questions.

Read More
Western blot
Human Cell lysate - whole cell (cancer-associated fibroblasts of prostate carcinom)
Loading amount
20 µg
cancer-associated fibroblasts of prostate carcinom
Gel Running Conditions
Reduced Denaturing (Invitrogen's NuPAGE 4-12%)
Blocking step
Milk as blocking agent for 16 hour(s) and 0 minute(s) · Concentration: 5% · Temperature: 4°C

Dr. Alexander Henke

Verified customer

Submitted Aug 03 2011

Western blot
Pig Tissue lysate - other (protein lysate from lymph node)
Loading amount
30 µg
protein lysate from lymph node
Gel Running Conditions
Reduced Denaturing (12%)
Blocking step
BSA as blocking agent for 1 hour(s) and 0 minute(s) · Concentration: 2% · Temperature: 25°C

Ms. Angela Moreno

Verified customer

Submitted Mar 04 2011


Thank you for your inquiry. Cells should be permeabilized with Triton X-100 and then incubated in 6 N Guanidine HCl in 50mM Tris-HCl, pH 7.5 for 10 minutes at room temperature. I hope this information is helpful to you. Please do not hesitate to contact us if you need any more advice or information.

Read More

1-10 of 13 Abreviews or Q&A

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