Chromatin Immunoprecipitation
Chromatin Immunoprecipitation - Related Videos
08:39
Chromatin Immunoprecipitation
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2023
Histones are proteins that help organize DNA in eukaryotic nuclei by serving as “scaffolds” around which DNA can be wrapped, forming a complex called “chromatin”. These proteins can be modified through the addition of chemical groups, and these changes affect gene expression. Researchers use a technique called chromatin immunoprecipitation (ChIP) to better understand which DNA regions associate with specific histone modifications or other gene regulatory proteins. Antibodies are used to isolate...
09:40
Analysis of the c-KIT Ligand Promoter Using Chromatin Immunoprecipitation
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2017
DNA-protein interactions are essential for multiple biological processes. During the evaluation of cellular functions, the analysis of DNA-protein interactions is indispensable for understanding gene regulation. Chromatin immunoprecipitation (ChIP) is a powerful tool to analyze such interactions in vivo.
13:47
Chromatin Immunoprecipitation (ChIP) using Drosophila tissue
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Cited by 10 •
2012
Recently high-throughput sequencing technology has greatly increased sensitivity of Chromatin Immunoprecipitation (ChIP) experiment and prompted its application using purified cells or dissected tissue. Here we delineate a method to use ChIP technique with Drosophila tissue, which can address the endogenous chromatin state in a well-characterized biological system.
14:29
Efficient Chromatin Immunoprecipitation using Limiting Amounts of Biomass
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Cited by 9 •
2013
We describe a robust method for chromatin immunoprecipitation using primary T cells. The method is founded on standard approaches, but uses a specific set of conditions and reagents that improve efficiency for limited a quantities of cells. Importantly, a detailed description of the data analysis phase is presented.
10:36
Chromatin Immunoprecipitation from Human Embryonic Stem Cells
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Cited by 6 •
2008
The differentiation of ESC coincides with cell-type specific changes in the structure and composition of chromatin. The detection of those changes provides valuable insights into the mechanisms that define stemcellness and cell differentiation. Chromatin immunoprecipitation (ChIP) represents a valuable method to dissect the molecular mechanisms underlying stem cell differentiation.
FAQs
Enrichment depends on whether the selected antibody captures the target protein or histone modification together with its associated DNA. A transcription-factor antibody focuses the analysis on regions linked to that regulatory protein, whereas an antibody against a histone modification reveals DNA carrying that epigenetic mark. The resulting enrichment connects molecular occupancy with chromatin-based regulation.
Preserving DNA–protein interactions keeps the regulatory associations present in the cells available for antibody capture. Fragmenting chromatin then produces DNA pieces that can be recovered and analyzed as enriched regions. These two stages connect the original chromatin state to the DNA measurements obtained after immunoprecipitation, allowing binding or modification patterns to be examined.
The target determines which aspect of chromatin regulation is examined. A transcription-factor target can reveal where a regulatory protein associates with DNA, while a histone-modification target can characterize an epigenetic feature. Comparing these target types helps distinguish protein occupancy from chromatin states when studying how gene regulation varies across biological conditions.
A typical experiment begins by treating cells to preserve DNA–protein interactions, followed by chromatin fragmentation. An antibody then selectively captures the target-associated material, and the enriched DNA is purified. Researchers analyze that DNA with quantitative PCR or sequencing, producing measurements or maps that relate the target protein or histone mark to genomic regions.
Both approaches examine the DNA recovered after selective capture, but they support different forms of analysis. Quantitative PCR can be used to measure enrichment at DNA regions of interest, whereas sequencing can identify and map associated regions more broadly. The choice therefore depends on whether the experiment emphasizes focused measurement or broader binding-site characterization.
Researchers can perform the assay on different cell types or experimental conditions and compare the DNA regions enriched for the same transcription factor or histone modification. Differences in these enrichment patterns indicate changes in regulatory associations or epigenetic marks. This comparison helps connect altered chromatin organization with condition-dependent regulation of gene expression.