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ab28523 |
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Dear technical support member,
I am using your anti-MAFA antibody (ab26405) and have a question related to the unmasking procedure I should use. According to the data sheet you suggest to use Tris-EDTA buffer (pH9), but there is no information about the steps to follow in your website; would you please send me a detailed protocol. |
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ANSWER: |
Thank you for contacting us. The IHC image on the datasheet for ab26405 was provided by a collaborator and we unfortunately do not have their exact protocol. However, it is safe to assume that the protocol is standard and that the unmasking procedure was similar to the procedure described in the PDF file I have attached, in section D: Antigen Retrieval. This general protocol can also be found on our website at this link: http://www.abcam.com/ps/pdf/protocols/ihc_p.pdf Section D contains a recipe for Tris-EDTA pH 9.0 and recommendations for heating. Briefly, if using a microwave or steamer or water bath, you will want to maintain the slides in the buffer at 95-100C for 10 - 20 minutes, followed by cooling for another 20 minutes. The optimal amount of time for your tissue sections will need to be determined but in general, 20 minutes at 95-100C is usually sufficient. 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"
The image shows human pancreas tissue in which some cells exhibit nuclear staining. The antigen retrieval method used was Tris EDTA pH9.
All lanes : Anti-MAFA antibody (ab26405) at 1 µg/ml
Lane 1 : Brain (Human) Tissue Lysate
Lane 2 : Kidney (Human) Tissue Lysate
Lane 3 : Liver (Human) Tissue Lysate
Lysates/proteins at 20 µg per lane.
Secondary
IRDye 680 Conjugated Goat Anti-Rabbit IgG (H+L) at 1/10000 dilution
Performed under reducing conditions.
Predicted band size : 37 kDa
Observed band size : 36 kDa (why is the actual band size different from the predicted?)
Human MAFA has a predicted molecular weight of 37 kDa (Swiss-Prot data), however publications have shown the human protein to be detected at 47 kDa (PMID 12011435 ). Our data shows ab26405 to detect a band at 36 kDa in human brain, kidney and liver which is similar to that seen in other publications (PMID:14680841, PMID:18159220 (expression profile) ). Abcam welcomes customer feedback and would appreciate any comments regarding this product and the data presented above.
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