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Chromatin Immunoprecipitation- ChIP

Chromatin Immunoprecipitation- ChIP

Chromatin immunoprecipitation, or ChIP, is an antibody-based technique used to identify sites on DNA that bind to transcription factors of interest or histone proteins. It also helps determine the type of histone modifications such as acetylation, phosphorylation, or methylation.
Types of ChIP
ChIP can be divided into two types - X-ChIP and N-ChIP. X-ChIP involves in vivo cross-linking of histones and regulatory proteins to DNA, fragmenting the DNA by sonication, and isolating the protein-DNA...

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Related Experiment Video

Updated: Apr 15, 2026

DNA Methylation: Bisulphite Modification and Analysis

DNA Methylation: Bisulphite Modification and Analysis

Published on: October 21, 2011

Integrated DNA methylation and chromatin structural analysis at single-molecule resolution.

Carolina E Pardo¹, Nancy H Nabilsi, Russell P Darst

¹Department of Biochemistry and Molecular Biology, University of Florida College of Medicine, 2033 Mowry Road, Box 103633, Gainesville, FL, 32610-3633, USA.

Methods in Molecular Biology (Clifton, N.J.)

|April 2, 2015

Summary

This study introduces a new method using DNA methyltransferases (MTases) to analyze DNA accessibility in individual cells. This technique reveals chromatin subpopulations and epigenetic variations, offering insights into cellular heterogeneity.

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Last Updated: Apr 15, 2026

DNA Methylation: Bisulphite Modification and Analysis

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Single-Cell Factor Localization on Chromatin using Ultra-Low Input Cleavage Under Targets and Release using Nuclease

Single-Cell Factor Localization on Chromatin using Ultra-Low Input Cleavage Under Targets and Release using Nuclease

Published on: February 1, 2022

Area of Science:

Epigenetics and Molecular Biology
Genomics and Proteomics

Background:

Chromatin structure regulates DNA accessibility, impacting essential cellular processes like transcription, replication, and repair.
Current methods often provide population averages, masking crucial cellular heterogeneity and rare epigenetic variants.
Transcriptional variations within cell populations can influence survival and disease progression.

Purpose of the Study:

To develop a single-molecule resolution technique for probing DNA accessibility within chromatin.
To utilize DNA methyltransferases (MTases) as novel probes for assessing chromatin structure and DNA methylation.
To overcome the limitations of population-averaged assays by enabling the study of individual cells.

Main Methods:

Development and application of recombinant DNA methyltransferase (MTase) M.CviPI.
Utilizing the Methylation Accessibility Protocol for Individual Templates (MAPit) on isolated mammalian cell nuclei and tissue.
Employing single-molecule resolution to analyze protein-DNA interactions and chromatin accessibility.

Main Results:

MAPit successfully probes chromatin accessibility at single-molecule resolution in mammalian systems.
The technique allows for the identification of distinct chromatin subpopulations within a cell population.
MAPit enables the detection of rare epigenetic variants and provides a comprehensive view of chromatin structure and DNA methylation simultaneously.

Conclusions:

DNA methyltransferases (MTases) serve as effective probes for analyzing DNA accessibility in chromatin.
The MAPit technique offers unprecedented resolution for studying cellular heterogeneity and epigenetic variations.
This approach provides a powerful tool for comprehensive analysis of chromatin structure and DNA methylation in a single assay.