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I just submitted an abreview of the tested antibody but forgot to input the discount code on the "additional comments" box. Could you please activate the discount (********) once the review is accepted? |
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Thank you for contacting us and for your Abreview. |
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Hello, |
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DISCOUNT CODE: ****** |
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Dear technical team, Our customer would like to purchase ab40657 and has inquiry about immnogen information. http://www.abcam.com/IGF1-antibody-ab40657.html It described as "Synthetic human insulin-like growth factor 1 [Ac60-70] covalently attached onto a carrier protein." 1. Why is this attached onto a carrier protein? The customer asked about the role of carrier protein and effect on antibody activity. 2. What is the meaning of "Ac" ([Ac60-70] )? Check them please. Thank you. |
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ANSWER: |
Thank you for your enquiry and your interest in our products. Native human IGF-1 is a 70 amino acid long peptide. We wanted to develop an antibody that bounds specifically to the -COOH terminus of the whole peptide, so we synthesized an 11-mer, i.e. residues #60-70 aa - to use as immunogen. Since we didn't want a free NH2-group at the amino terminal, we capped the amino terminus during synthesis by acetylating it with acetic anhydride which adds an acetyl group, i.e. the Ac moiety. Thus the resulting synthetic analogue of the carboxyl terminal region is Ac60-70. This synthetic peptide was coupled onto bovine thyroglobulin as carrier protein to elicit an antibody response since the immune system will not recognize small peptides, such as this 11-amino acid long analogue, as an antigen without it being conjugated onto a much larger protein. I hope this helps and if I can assist further, please do not hesitate to contact me. |
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We received a lyophilised antibody. data sheet said dilute with 0.1 ml 0f 10mg/mlBSA in PBS. Please simplify. we have only PBS of distilled water as diluent. how many ml do we have to add.please answer asap. thanks. |
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ANSWER: |
Thank you for your enquiry. I am sorry to hear that you are having problems with using one of our products. This product is supplied as lyophilized powder, which should be stored at 4oC until rehydrated. Histochemical grade antibodies should be diluted with PBS that contains either 1.0% BSA or 1% normal goat serum, aliquoted into single use portions, and stored frozen at -20C: do not repeatedly freeze and thaw. I hope this information will be useful. Please do not hesitate to contact me again if you require further information. Good luck in your research. |
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Please note: All products are "FOR RESEARCH USE ONLY AND ARE NOT INTENDED FOR DIAGNOSTIC OR THERAPEUTIC USE"
ab40657 staining IGF1 in murine prostate tissue by Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections).Tissue was fixed with paraformaldehyde and an antigen retrieval step was performed using citrate buffer. Samples were then blocked with 1% serum for 20 minutes at 25°C and then incubated with ab40657 at a 1/1000 dilution for 18 hours at 4°C. The secondary used was a biotin conjugated horse polyclonal used at a 1/50 dilution.
Image courtesy of Dr Lucila Sackmann Sala by Abreview.
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