Histone - Wikipedia, the free encyclopedia
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In biology, histones are strongly alkaline proteins found in eukaryotic cell nuclei, which package and order the DNA into structural units called nucleosomes. They are the chief protein components o...
en.wikipedia.org/wiki/Histone
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consequently, this compacted structure is inherently repressive to processes that require access to the DNA sequence. The role of higher order chromatin folding in transcriptional control received the lion's share of interest in the early 1980s [e.g., ... Linker histones are not related in sequence to the core histones,
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scienceweek.com/2004/sa041231-3.htm
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In fact chromosomal DNA is packaged into a compact structure with the help of specialized proteins called histones. The complex DNA plus histones in eucaryotic cells is called chromatin. ... This suggests higher orders of packaging, to give a chromosome the compact structure seen in a typical karyotype (metaphase) cell...
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www.accessexcellence.org/AB/GG/nucleosome.html
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Principles of Genetics Pages ... Role of histone proteins in packaging DNA ... Tandem gene family arrays are made up of multiple copies of the same gene all next to each other (such as histones). The nucleolar organizer, which is cytologically distinct, is a tandem array of genes that encode ribosomal RNA.
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www.mun.ca/biology/desmid/brian/BIOL2250/Week_Two/1Gene...
www.mun.ca/biology/desmid/brian/BIOL2250/Week_Two/1GeneW2b.html
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The fundamental unit of this packaging is the nucleosome, comprising two copies of each of four different histone proteins, around which is wrapped the double-stranded DNA. ... Deacetylation of histones represents the other aspect of this control, and is frequently associated with gene silencing. Plant pathogens that...
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www.ns.msu.edu/genetics/ResearchAreas/chromatinstructur...
www.ns.msu.edu/genetics/ResearchAreas/chromatinstructure.htm
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Roles of DNA Packaging Protein Revealed By Einstein Scientists ... A chromosome's combination of histone proteins and DNA is referred to as chromatin. Four of the five histones called core histones form protein "spools" around which DNA is tightly wound into a nucleosome; ... In this study, to assess H1's role in more detail,
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www.aecom.yu.edu/home/news.asp?id=300
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B. Role of Histones in DNA packaging. Terms to know and structures to know: ... Nucleosome: 1st order or packaging (beads on a string) Fig. 3-38 ... Histones and their role in above...
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www.biosci.ohio-state.edu/mg605/One/Chromatin/chromatin...
www.biosci.ohio-state.edu/mg605/One/Chromatin/chromatin.html
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MIT biologists have discovered that the organization of DNA's packing material plays a critical role in directing stem cells to become different types of adult cells. The work, to be published in the journal Cell on Nov. 14, could also shed light on the possible role of DNA packaging in cancer development.
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www.medicalnewstoday.com/articles/128478.php
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H1 is one of the five histones - proteins that help to "package" the DNA within chromosomes. All organisms whose cells contain a nucleus - from yeast to humans - have histones in their nuclei. ... H1 is thought to help in organizing and compacting the DNA in chromosomes, but questions persist about its actual role.
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www.eurekalert.org/pub_releases/2009-02/aeco-rod021209....
www.eurekalert.org/pub_releases/2009-02/aeco-rod021209.php
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