Products:Tags & Cell Markers >> Subcellular Markers >> Organelles >> Mitochondria
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Dear Technical, |
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ANSWER: |
Thank you for your enquiry. |
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Our customer would like to use ab14734 for IHC-P, staining of human cancer sections (from different origins) and healthy human sections. Kindly advise if this specific antibody (ab14734) will help to distinguish between healthy and cancer tissue? In addition to that, please explain the difference between Anti-VDAC1 / Porin antibodies with the addition of "Mitochondrial Loading Control" after the name of the antibody (like ab14734) and Anti-VDAC1 / Porin antibodies that lack this description (ab34726, for ex). Thanks in advance for your assistance. |
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ANSWER: |
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. |
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What percentage of Guanidine HCl should be used to prepare fixed cells for ICC and how long should they be treated for? |
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ANSWER: |
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. |
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Please note: All products are "FOR RESEARCH USE ONLY AND ARE NOT INTENDED FOR DIAGNOSTIC OR THERAPEUTIC USE"
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 VDAC/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.
Image courtesy of M Schrader by Abreview.
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