Anti-APAF1 抗体 (ab2001)

Thank you for your reply.

As requested, I have placed a free of charge vial of ab59388 onto order 1083546. This should be shipped today or tomorrow and estimated delivery time is next Wednesday or Thursday.

I hope this will be helpful to you. If you need anything further, please do not hesitate to contact me. I am away from the office next week, but my colleagues will be happy to help you.

Thank you for your message and for kindly confirming these details.

According to our records, ab59388 was ordered in October which is past our 6 month guarantee period. However, reviewing the details, I can make an exception and provide a replacement or credit note for ab59388 in this case.

With regards to the other free of charge order for ab2001, order ref 1083546, I apologise for the delay. I would appreciate if you could confirm if you would like the replacement for ab59388 aswell, then I can add this to the same order and arrange for this to be shipped tomorrow (Wednesday) and it will take about 6 days to get to you.

I am sorry we do not ship antibodies on dry ice in order to avoid an extra freeze thaw cycle. They are shipped on ice, and with careful monitoring of customer feedback, we are not aware that this causes any problems with product quality.

Thank you for your time and cooperation. I look forward to hearing from you.

Thank you for confirming these details and for your cooperation. The details provided enable us to closely monitor the quality of our products.

I am sorry this product did not perform as stated on the datasheet and for the inconvenience this has caused. As requested, I have issued a free of charge replacement:

Order number: 1083546

To check the status of the order please contact our Customer Service team and reference this number.

Please note that this free of charge replacement vial is also covered by our Abpromise guarantee. Should you still be experiencing difficulties, or if you have any further questions, please do not hesitate to let us know.

I wish you the best of luck with your research.

Thank you for your message and for kindly providing this further information.

I am sorry to hear the suggestions made have not improved the results on this occasion. I appreciate the time you have spent on these experiments and would be pleased to arrange a free of charge replacement or credit note in compensation.

I look forward to hearing from you with details of how you would like to proceed.

Thank you for providing this further information.

I appreciate your cooperation and understand your concerns. It is regrettable the results have not been succesful. I have traced your previous corresopndence and reveiwed this case.

With regards to the band sizes expected for PAF1 protein in WB, the Uniprot protein database lists 6 isoforms of different sizes:

http://www.uniprot.org/uniprot/O14727
Isform 1 142 kDa
Isoform 2 141 Kda
Isoform 3 136 Kda
Isoform 4 137 kDa
Isoform 5 133 kDa
Isoform 6 37 kDa

Unfortunately, none of these would match the bands at 55 - 75 kDa that you are seeing. I can confirm this antibody has not specifically been tested on brain samples in WB and regrettably, I am having difficulty confirming which isoforms are known to be expressed in the brain with a literature search. I could just find the following article: http://www.pnas.org/content/104/52/20820.full that mentions normal brain has little Apaf-1 and tumors have a higher level, but unfortunately nothing specific to which isoforms are in the brain.

Could you confirm if any samples from other tissue have been included as a positive control? I can suggest this would be highly beneficial in this case.

In order to help with our investigation of this case before deciding how to proceed, I would appreciate if you are able to provide more detail as requested in the previous email. This information will also be helpful to our quality monitoring.

1. Please confirm the Abcam order reference number and date of purchase

2. For the secondary antibody, I can suggest an anti-rabbit secondary would be required to detect the rabbit polyclonal primary. An anti-goat would not detect rabbit polyclonal. If the correct secondary is being used, I can sugest it is also worth considering if the current vial is working well with other primary antibodies?.

3. Try a higher concentration of antibody to increase the signal. Try 1:1000. Incubate overnight 4oC.

4. Could you confirm which lysis buffer was used? I can recommend to lyse the cells in RIPA lysis buffer if this has not already been tried, before adding SDS loading buffer such as Laemmli to reduce and denature the samples. This should provide a more suitable protein preparation.

I would appreciate if you could also provide an image, including molecular weight markers, which would help us to assess the results.

I will be pleased to provide a free of charge replacmenet or credit note if the antibody is not working with the suggestions provided.

Thank you for your time and cooperation. We look forward to receiving the requested information and results from the positive control.

Thank you for taking the time to complete our questionnaire and contact us. I am sorry to hear you have had difficulty obtaining satisfactory results from this antibody.

The details you have kindly provided will enable us to investigate this case for you and this is also helpful in our records for monitoring of quality.

I would like to reassure you that ab2001 is tested and covered by our 6 month guarantee for use in WB and rat samples. In the event that a product is not functioning in the applications cited on the product data sheet, we will be pleased to provide a credit note or free of charge replacement.

Reviewing this case, I would like to offer some suggestions to help optimise the results from ab2001. I would also appreciate if you can confirm some further details:

1. Please confirm the Abcam order reference number and date of purchase

2. For the secondary antibody, I can suggest an anti-rabbit secondary would be required to detect the rabbit polyclonal primary. An anti-goat would not detect rabbit polyclonal. If the correct secondary is being used, I can sugest it is also worth considering if the current vial is working well with other primary antibodies?.

3. Try a higher concentration of antibody to increase the signal. Try 1:1000. Incubate overnight 4oC.

4. Could you confirm which lysis buffer was used? I can recommend to lyse the cells in RIPA lysis buffer if this has not already been tried, before adding SDS loading buffer such as Laemmli to reduce and denature the samples. This should provide a more suitable protein preparation.

I hope this information is helpful, thank you for your cooperation. Should the suggestions not improve the results, please do not hesitate to contact me again with the further requested details.