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Updated: Aug 2, 2026

Whole Mount in Situ Hybridization of E8.5 to E11.5 Mouse Embryos
Published on: October 10, 2011
Transcription of dinucleosomal templates
1Laboratory of Molecular Embryology, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland 20892-5430, USA.
Abstract:
Nucleosomes and the chromatin structures they assemble provide the architectural foundation for the transcription process. We describe the use of reconstituted chromatin templates assembled using purified histones and HMGs to investigate the significance of chromatin structure for transcription. Our structural assays include sucrose gradient fractionation, nucleoprotein gel analysis, micrococcal nuclease digestion, DNase I and hydroxyl radical cleavage mapping of nucleosome position, and determination of nucleosome mobility. We determine the consequences of incorporation of linker histones or HMG1 on the properties of the nucleosome and the transcription process. Our results indicate that linker histones and HMG1 can direct the positioning of core histone-DNA interactions, restrict nucleosome mobility, and repress transcription.
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Transcription
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds...
DNA as a Genetic Template
Transcription
Transcription Can Produce Different Kinds of RNA Molecules
In eukaryotes,...
DNA as a Genetic Template
The Nucleosome
DNA is wound twice around a protein complex called histone core, that consist of 8 histone proteins. This complex...
The DNA Replication Fork

