ChIP Human - MCF-7

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 3 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

MAGnify™ Chromatin Immunoprecipitation System

Thermo Fisher Scientific

Upstream tips	Protocol tips	Downstream tips
-The 1.25 M glycine must be at room temperature before use. -The Lysis Buffer must be at room temperature and fully resuspended before use. Vortex briefly to resuspend.	-For each ChIP reaction, use 10,000–300,000 cells or 0.167–5 mg of tissue. -1–10 μg of antibody is a typical starting range. - 10-minute crosslinking step using formaldehyde at a 1% final concentration. -Keep the cell lysate cooled on ice during sonication.

Upstream tips
-The 1.25 M glycine must be at room temperature before use. -The Lysis Buffer must be at room temperature and fully resuspended before use. Vortex briefly to resuspend.
Protocol tips
-For each ChIP reaction, use 10,000–300,000 cells or 0.167–5 mg of tissue. -1–10 μg of antibody is a typical starting range. - 10-minute crosslinking step using formaldehyde at a 1% final concentration. -Keep the cell lysate cooled on ice during sonication.

Manufacturer protocol Publication protocol 1 Relevant paper

RIP-Assay Kit for microRNA

MBL international corporation

Upstream tips	Protocol tips	Downstream tips
-Do not freeze the kit.	-If solution II is turbid, equilibrate to room temperature and mix well before use. -If solution III contains precipitates, dissolve them by equilibrating the solution at room temperature and mix well before use. -Always use freshly cultured cells.

Upstream tips
-Do not freeze the kit.
Protocol tips
-If solution II is turbid, equilibrate to room temperature and mix well before use. -If solution III contains precipitates, dissolve them by equilibrating the solution at room temperature and mix well before use. -Always use freshly cultured cells.

Manufacturer protocol Publication protocol 1 Relevant paper

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