Related Experiment Video
Updated: Aug 11, 2026
13:47
Chromatin Immunoprecipitation (ChIP) using Drosophila tissue
Published on: March 23, 2012
Biochemical analysis of chromatin structure and function using Drosophila embryo extracts
T A Blank1, R Sandaltzopoulos, P B Becker
1European Molecular Biology Laboratory (EMBL), Heidelberg, Germany.
Methods (San Diego, Calif.)
|May 1, 1997
Summary
Cell-free systems using Drosophila embryo extracts enable chromatin assembly. This method allows detailed biochemical analysis of chromatin structure and function, mimicking native chromatin for research.
Area of Science:
- Biochemistry
- Molecular Biology
- Genetics
Background:
- Cell-free systems are crucial for studying chromatin structure and function under physiological conditions.
- Early Drosophila embryos provide rich maternal stocks of histones and assembly factors for chromatin reconstitution.
Purpose of the Study:
- To highlight the utility of Drosophila embryo extracts as a cell-free system for chromatin assembly.
- To demonstrate the capacity for generating chromatin with specific, variant properties.
Main Methods:
- Utilizing cell-free extracts from early Drosophila embryos for chromatin assembly.
- Manipulating reconstitution conditions to alter chromatin properties.
Main Results:
- Chromatin assembled in vitro resembles native chromatin in repeat length, complexity, and dynamic properties.
- The system allows for the synthesis of chromatin with variant histone modifications and protein content.
- The assembled chromatin supports the interaction of DNA-binding proteins.
Conclusions:
- Drosophila embryo extracts offer a powerful tool for biochemical analysis of chromatin.
- This system facilitates the study of structure-function relationships in chromatin.
- It enables investigation into the functional significance of chromatin heterogeneity.
Related Concept Videos
02:36Chromatin 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...
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...
02:38Heterochromatin
The extent of chromatin compaction can be studied by staining chromatin using specific DNA binding dyes. Under the microscope, the dense-compacted regions that take up more dye are called heterochromatin. Heterochromatin is further classified into two forms – constitutive heterochromatin and facultative heterochromatin.
Constitutive heterochromatin: It is a highly compact region of chromatin that is mostly concentrated in the centromere and telomere. Unlike euchromatin, the amino acid at 9th...
Constitutive heterochromatin: It is a highly compact region of chromatin that is mostly concentrated in the centromere and telomere. Unlike euchromatin, the amino acid at 9th...