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Immunoprecipitation

Immunoprecipitation

Immunoprecipitation, or IP, is a widely used technique that employs protein-antibody interactions to isolate proteins or protein complexes in their native state for studying protein-protein interactions, quaternary structures, or supramolecular complexes. Various modifications of the technique, including chromatin IP, cross-linking IP, and fluorescence IP, are commonly used.
Chromatin Immunoprecipitation
Chromatin immunoprecipitation, also known as ChIP, is used to study protein-DNA or...

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: Feb 27, 2026

Isolation of Cognate RNA-protein Complexes from Cells Using Oligonucleotide-directed Elution

Isolation of Cognate RNA-protein Complexes from Cells Using Oligonucleotide-directed Elution

Published on: January 16, 2017

RIP: RNA Immunoprecipitation.

Miriam Gagliardi¹, Maria R Matarazzo²

¹Institute of Genetics and Biophysics "ABT"- CNR, via Pietro Castellino 111, 80131, Naples, Italy.

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

|September 24, 2016

Summary

RNA immunoprecipitation (RIP) maps protein-RNA interactions in vivo. This method identifies RNAs bound by specific proteins, with native and cross-linked variants offering different insights into binding sites.

Keywords:

Cross-linked RIP Native RIP Protein-RNA interaction RNA immunoprecipitation

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Method for the Isolation and Identification of mRNAs, microRNAs and Protein Components of Ribonucleoprotein Complexes from Cell Extracts using RIP-Chip

Method for the Isolation and Identification of mRNAs, microRNAs and Protein Components of Ribonucleoprotein Complexes from Cell Extracts using RIP-Chip

Published on: September 29, 2012

A Rapid High-throughput Method for Mapping Ribonucleoproteins RNPs on Human pre-mRNA

A Rapid High-throughput Method for Mapping Ribonucleoproteins RNPs on Human pre-mRNA

Published on: December 2, 2009

Related Experiment Videos

Last Updated: Feb 27, 2026

Isolation of Cognate RNA-protein Complexes from Cells Using Oligonucleotide-directed Elution

Isolation of Cognate RNA-protein Complexes from Cells Using Oligonucleotide-directed Elution

Published on: January 16, 2017

Method for the Isolation and Identification of mRNAs, microRNAs and Protein Components of Ribonucleoprotein Complexes from Cell Extracts using RIP-Chip

Method for the Isolation and Identification of mRNAs, microRNAs and Protein Components of Ribonucleoprotein Complexes from Cell Extracts using RIP-Chip

Published on: September 29, 2012

A Rapid High-throughput Method for Mapping Ribonucleoproteins RNPs on Human pre-mRNA

A Rapid High-throughput Method for Mapping Ribonucleoproteins RNPs on Human pre-mRNA

Published on: December 2, 2009

Area of Science:

Molecular Biology
Genetics
Biochemistry

Background:

RNA-protein interactions are crucial for gene regulation.
Mapping these interactions is key to understanding RNA function.
RNA immunoprecipitation (RIP) is a vital technique in this field.

Purpose of the Study:

To detail the principles and methods of RNA immunoprecipitation (RIP).
To describe native and cross-linked RIP protocols for mammalian cells.
To highlight considerations for experimental design and data interpretation.

Main Methods:

Utilizes antibodies to immunoprecipitate RNA-binding proteins (RBPs) and associated RNAs.
Employs techniques like PCR, hybridization, or sequencing for RNA analysis.
Differentiates between native RIP (direct RNA binding) and cross-linked RIP (direct/indirect binding sites).

Main Results:

Native RIP identifies bound RNAs and their abundance.
Cross-linked RIP precisely maps RBP binding sites on RNA molecules.
Provides protocols and considerations for successful mammalian cell RIP experiments.

Conclusions:

RIP is a powerful tool for studying in vivo RNA-protein associations.
Native and cross-linked RIP offer complementary information on RNA-RBP interactions.
Careful experimental design and interpretation are essential for accurate results.