ChIP Human - LCL

DNA-protein interactions are studied by using ChIP. The basic steps in this technique are crosslinking, sonication, immunoprecipitation, and analysis of the immunoprecipitated DNA. During ChIP, if chromatin is under-fragmented or fragments are too large which can lead to the increased background and lower resolution. Shorter cross-linking times (5-10 min) and/or lower formaldehyde concentrations (<1%) may improve shearing efficiency. If Chromatin is over-fragmented, then optimize shearing conditions for each cell type to improve ChIP efficiency. Over-sonication of chromatin may disrupt chromatin integrity and denature antibody epitopes. If you do not see any product or very little product in the input PCR reactions, add 5–10 μg chromatin per IP.

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Found 2 matching solutions for this experiment

Imprint® Chromatin Immunoprecipitation Kit

Sigma-Aldrich

Upstream tips	Protocol tips	Downstream tips
-If any reagent has formed a precipitate, warm at 55 °C until dissolved. Allow to equilibrate to room temperature before use.	-Use 1 µg of antibody per well. -The range of cells that can be used with this kit is 0.2–2.5 x 105/well/ChIP sample. Using more than 0.5 million cells per well will increase the non-specific binding and reduce the yield and specificity of the ChIP reaction. If higher yield of ChIP DNA is desired for downstream applications (e.g. ChIP-Seq., ChIP-chip): a) DNA could be pooled by eluting consecutively (with 50 µl of elution buffer) from multiple individual ChIP reactions.

Upstream tips
-If any reagent has formed a precipitate, warm at 55 °C until dissolved. Allow to equilibrate to room temperature before use.
Protocol tips
-Use 1 µg of antibody per well. -The range of cells that can be used with this kit is 0.2–2.5 x 105/well/ChIP sample. Using more than 0.5 million cells per well will increase the non-specific binding and reduce the yield and specificity of the ChIP reaction. If higher yield of ChIP DNA is desired for downstream applications (e.g. ChIP-Seq., ChIP-chip): a) DNA could be pooled by eluting consecutively (with 50 µl of elution buffer) from multiple individual ChIP reactions.

Manufacturer protocol Publication protocol 1 Relevant paper

Re-ChIP-IT®

Active Motif

Upstream tips	Protocol tips	Downstream tips
-Protein G magnetic beads should be stored at 4C.	-Use ChIP validated antibody. -Use 1-3 ug of antibody and add lastly to the reaction.	-The diluted Proteinase K stop solution can not be stored.

Upstream tips
-Protein G magnetic beads should be stored at 4C.
Protocol tips
-Use ChIP validated antibody. -Use 1-3 ug of antibody and add lastly to the reaction.
Downstream tips
-The diluted Proteinase K stop solution can not be stored.

Manufacturer protocol Publication protocol 1 Relevant paper

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