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I'm afraid the discount is somewhat missing the point. What we really want is for the antibody to be concentrated prior to sale. The new batch is massively less effective than the tissue culture supernatant. Obviously, XXXXXXXXX is welcome, but it does not address the fact that our bills have gone up nearly 50% as a result of Abcam selling an inferior product.
Asked on Jun 11 2012
Thank you very much for your patience. I apologize for the delay as it took me longer than expected, due to interdepartmental communications.
I have checked the previous history of this antibody and found that the purity of this antibody was actually changed 5 years back and not this year. This means you received the same antibody purity throughout i.e. in the form of tissue culture supernatant rather than Ascites. We have notsold this antibody as purified, so the low activity observed is unlikey to be due to a change in purity. This could be due to a change in protocol, batch to batch variations or one off bad vial etc. Could you confirm whether the protocol was changed between the lots? Did you observe any difference with other lots?
It is true that we were unable to update the datasheet in time, and we apologize for this. This antibody has never been purified so we do not know the concentration dependant activity of this product. I can assure you that, the quality of this antibody was always of high standard and each lot gave good results. We were unaware of any problem before your call.
This investigation has revealed that, nothing recently changed with this antibody; and unfortunately as a result we are unable to determine, why you have observed low activity. We appreciate your cooperation in this whole case and as a valued customer; XXXXXXXXX
I will also give you a call after lunch in order to know more about the problem and any progress you have made in past few weeks.
Once again many thanks for your cooperation. Speak to you soon.
Answered on Jun 11 2012