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 life eight lecture phenotype expression wrap physiological peptide polypeptide mutation laboratory histones nucleolus methyl chemistry suppress biochemistry macromolecule deoxyribonucleic chromosomes dna molecule biological microscopic anatomy scientific h1 h3 cell h4 genetics h2a h2b nucleus biotechnology epigenetic pack methylation nucleotide tail microbiology regulation infographic

Nucleosome Vector Illustration


Nucleosome Vector Illustration
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Nucleosome #321337194
Description

A nucleosome is the basic structural unit of chromatin, the complex of DNA and proteins that makes up chromosomes within the nucleus of eukaryotic cells. It consists of a segment of DNA wound around a core of histone proteins.The core of the nucleosome is composed of eight histone proteins: two copies each of histones H2A, H2B, H3, and H4. The DNA is wrapped around this histone core in about 1.65 turns in a left-handed superhelix, forming a structure resembling beads on a string.

Nucleosome core particle structure
Structure of a nucleosome
Nucleosome
Nucleosome
Structure of a nucleosome

Nucleosome structure. Structure of an oligonucleosome, showing the packaging of DNA in chromosomes. 3D illustration
Human nucleosome with CpG methylated (red) DNA showed