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| ChIP Chromatin Immunoprecipitation Forum Chromatin Immunoprecipitation Forum. Discuss, chat about, and post questions about the ChIP assay, in the ChIP forum. Includes troubleshooting, protocols, buffer preparation, and more. |
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| Hello, I am using the Life Technologies MAGnify ChIP kit with 2 X10^6 freshly isolated human neutrophils. About 50% of the time, I get a decent smear on my agarose gel at the right size, and 50% of the time the smear is very faint. I have optimized the shearing conditions to get a population of fragments of the desired size but am struggling to understand why the yield of DNA is so variable. I cross-link for 10 minutes with 1% formadlehyde and am using the Covaris S2 for 12 minutes shear consistently with my cells. Any guidance about what may affect the yield of DNA would be greatly appreciated. |
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| chip , dna , dna yield , low , neutrophils , yield |
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