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ich hoffe die ausgefüllte Anlage ist hilfreich. Die schlechten Blots habe ich gar nicht eingescannt, Könnte es aber bei Bedarf noch machen. Bei den angefügten Western ist die quantitative Auswertung durch den starken Hintergrund nicht möglich. Ich hoffe Sie können mir weiterhelfen. |
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1. Bleiben Sie bei einem Blockmittel während des Experimentes, also entweder Milch oder BSA, aber eben keine Kombination. Desweiteren scheinen monoklonale Antikörper bessere Ergebnisse mit 3% BSA zu liefern als mit Milch (siehe Anhang). |
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herzlichen Dank für die Ersatzlieferung des BMP4 Antikörpers. Er ist heute angekommen, war allerdings nicht mehr gekühlt, der Kühlakku hatte Raumtemperatur. Funktioniert er dann trotzdem noch? |
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Das sollte eigentlich kein Problem darstellen: wir versenden unsere Produkte ja z. B. auch nach Australien oder Thailand, und da sind die auch schon ein mal bis zu 7 Tagen unterwegs, ohne das die Qualität leidet. |
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Black blot! Old lots always worked. |
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Es tut mir leid, dass Sie Probleme mit diesem Antikörper hatten. Wie am Telefon besprochen habe ich eine kostenlose Ersatzlieferung für Sie in Auftrag gegeben. Sie hat die Referenznummer XXXXX und sollte ab dem 23. Mai bei Ihnen ankommen. |
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Thanks. I'm using the Human Osteosarcoma Cell Line (SaOS-2). Secondary antibody is working as I used the same with other primary antibody which fits to the same. But still I'll give a try by increasing the primary conc, and no primary control too. Thanks once again. |
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ANSWER: |
The human cell line that your are using should be fine for this antibody. Please let me know the results of the no primary control and also if increasing the concentration of the primary works out. |
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What application are you using this antibody in? >>Western Blotting Lot number: >>18797 Purchase Order Number or preferably Abcam Order Number: >> #25442 (dated Oct 13,2003) Description of the problem: (no signal, high background, non-specific signal etc). >>First Time I used the dilutions of 1/50,000 in Primary but didn't get any detectable signal. Then to optimize it I made the Primary Antibody Dilutions of 1/1,000 and 1/5,000 and the Secondary as 1/50,000 , 1/150,000 and 1/250,000 dilutions. Tried the 2x3 = 6 combinations in strips. I got some multiple bands in the Primary 1/1000 and Secondary 1/50,000 dilutions combination. Rest of them didn't gave any signal. Do you have any BMP-4 as polyclonal antibody? Sample (Species/Cell extract/Nuclear extract/Purified protein/ Recombinant protein etc) >>Cell lysate Proteins Sample preparation >> samples are prepared using Bio-Rad Ready Gel 4-20 % Gradient Tris-HCl Gel Blocking Conditions (Buffer/Time period, Blocking agent etc) >> 1 hr in 5% milk , 0.1% tween 20 in PBS Primary Antibody (Manufacturer/Species/Diluent/Dilution/ Incubation time, Wash step) >> Abcam BMP-4 Secondary Antibody (Manufacturer/Species/Diluent/Dilution/ Incubation time, Wash step) >>Pierce Technology (www.piercenet.com) Goat Anti-mouse # 1858413 , Prepared in Blocking solution and incubated for 1 hr at room temp. Detection method >> UVP Chemi system. Used the Pierce Super Signal West Dura Substrate (# 34075) to detect. Positive and negative controls used. (Please specify) >>None Optimization attempts (problem solving) >> after optimization of the dilutions I tried with the full experiment. Ended with bands that were not in the range(size wise). Have you run a "No primary" control? >> Not run How many times have you tried this assay? >> 3 times . What steps have you altered? >> Used the diff dilutions. >> Tried different incubation methods. Thanks for taking time to troubleshoot. Regards, Vikas Saini UIC Bioengineering
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ANSWER: |
Thank you for the details of your protocol. First, I suggest using a positive control. What species are your samples from? Ab6296 was tested on human recombinant purified BMP-4 (50 ng)at a concentration of 1-2 ug/ml. Second, is your secondary antibody working? Try a no primary control to test this. In addition, you may want to increase the concentration more. At this time we don't have a polyclonal BMP-4 antibody. Please let me know if you have any more questions or concerns. |
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