Nucleosome - Wikipedia, the free encyclopedia
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Nucleosomes form the fundamental repeating units of eukaryotic chromatin, which is used to pack the large eukaryotic genomes into the nucleus while still ensuring appropriate access to it (in mammali...
en.wikipedia.org/wiki/Nucleosome
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The first level of this higher-order organization is the nucleosome core particle, in which a 147–base pair (bp) stretch of DNA is wrapped around a ...
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www.nature.com/nchembio/journal/v2/n2/full/nchembio0206...
www.nature.com/nchembio/journal/v2/n2/full/nchembio0206-64.html
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Each nucleosome is composed of DNA wrapped around an octamer of the four core histones H2A, H2B, H3 and H4. This tight packaging, which is further helped by linker histones and other less-abundant proteins, produces condensed chromosomes that allow faithful segregation of the genetic material in dividing cells.
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www.nature.com/milestones/miledna/full/nrg2249.html
www.nature.com/milestones/miledna/full/nrg2249.html
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22. In a nucleosome, what is the DNA wrapped around? a. polymerase molecules b. ribosomes c. mRNA d. histones e. nucleolus protein ... d. it consists of a single molecule of DNA wound around nucleosomes. e. active transcription occurs on euchromatin.
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www.billwilcox.net/Ch19online/19quiz.htm
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1. A virus injects its DNA into a cell. Some genes are transcribed quite rapidly. Those; genes are probably involved in; A. producing DNA polymerases; B. ... 2. In a nucleosome, what is the DNA wrapped around?; A. polymerase molecules; B. ribosomes; C. mRNA; D. histones; E. nucleolus protein...
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www.und.edu/instruct/rsweitze/b151/Exam2Reviewquestions...
www.und.edu/instruct/rsweitze/b151/Exam2Reviewquestions.html
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Legend: Nucleosome: Subunit of chromatin composed of a short length of DNA wrapped around a core of histone proteins. The human genome contains about 3 billion nucleotide pairs organized as 23 chromosomes pairs.
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www.accessexcellence.org/AB/GG/nucleosome.html
www.accessexcellence.org/AB/GG/nucleosome.html
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Since opposite charges attract, the DNA is pulled in toward the histones. A nucleosome is a segment of the DNA wrapped around a core of histones.
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www.pbs.org/wgbh/nova/genome/dna_sans.html
www.pbs.org/wgbh/nova/genome/dna_sans.html
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Current models of the yeast kinetochore propose that the yeast centromere DNA is wrapped around a Cse4p variant nucleosome. Here we present evidence that the histone-fold domain of Cse4p interacts specifically with CDE I and CDE II centromere DNA.
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www.genetics.org/cgi/content/full/156/3/973
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Eukaryotic chromosomes are packaged in condensed chromatin structures whose primary unit, the nucleosome, is composed of about 147 DNA base pairs wrapped around a histone octamer (1,2). Nucleosomes, as well as the enzymes that remodel and modify them, are key regulators of genome activity (3).
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nar.oxfordjournals.org/cgi/content/full/36/11/3746
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