Anti-CYP2C9 antibody (ab4236)

Thank you for your reply and for sending your data. I agree that the results you have obtained are difficult to interpret. For that reason, I would be happy to offer you free of charge replacements, or a credit or refund. Please let me know how you would like to proceed and I will be happy to assist you further.

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Because ab4236 is a rabbit polyclonal antibody that was raised against a full length protein, you could use a full length recombinant Cytochrome P450 2C9 protein such as ab56998 for blocking. It is very difficult and expensive to achieve full blocking using a full length protein, however you may be able to observe a reduction in the specific signal by pre-incubation with this product. After checking with the lab, a blocking peptide for ab110746 is not currently available.
I am sorry I could not be more helpful, please let me know if you need any additional information or assistance.

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Expiration date: May 26th, 2012

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Thank you for contacting us. For ab23677, LTA4 hydrolase, I suggest either a neutrophil or monocyte lysate. We carry THP1 lysate, ab7913, which is a human monocytic leukemia. For a negative control, LTA4 was detected in epidermal keratinocytes and endothelial cells but not whole skin in the following paper: Leukotriene A4 hydrolase in human skin. J Invest Dermatol. 1994 Feb;102(2):253-7. PMID: 8106755 Our lysate ab30166 may be suitable as a negative control but I cannot guarantee you will not see some reactivity. For the cytochrome P450 enzymes, I suggest liver lysates. A positive control for ab4236 is human liver: ab29889. For ab13513 and ab3573, rat liver lysate ab29413 will be appropriate. I am reluctant to recommend a negative control since information regarding absence of expression is difficult to come by but since CP450 is associated with the ER, cytoplasmic fractions of liver lysates (which do not contain membrane) may be useful. For human liver, this would be ab29875, and for rat liver ab29409. You should also have a look at the references listed on the datasheets to see how other researchers have used the antibodies, though the references for the LTA4 are general and not specific to the antibody. I hope this helps. Please do not hesitate to contact us if you have any other questions.