File:Basic units of chromatin structure.svg

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Summary

Description
English: The histone octamer is formed from two subunits each of the four core histones. The four H3 and H4 subunits form a tightly packed tetramer that associates with two H2A/H2B dimers to form each octamer. About 147 bp of DNA is wrapped around the octamer to form a nucleosome. Nucleosomes can be arrayed in the loosely packed beads-on-a-string form of chromatin, but are generally more tightly packaged into the 30-nm fiber. Fiber formation requires histone tails and additional proteins, neither of which is shown here.[1]
Date
Source The Cell Cycle. Principles of Control.
Author David O Morgan
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Captions

A schematic showing the basic structure of nucleosomes and how they bind to DNA.

inception

1 January 2007

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checksum

f04ebbf62cac03b5df67d0a7844215b479676581

determination method: SHA-1

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239,506 byte

height

1,152 pixel

width

512 pixel

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current18:03, 1 May 2020Thumbnail for version as of 18:03, 1 May 2020512 × 1,152 (234 KB)Rob HurtUploaded a work by David O Morgan from The Cell Cycle. Principles of Control. with UploadWizard
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