Definition of chromatin
: a complex chiefly of DNA and histone in eukaryotic cells that is usually dispersed in the interphase nucleus and condensed into chromosomes in mitosis and meiosis and in which the nucleosome makes up its repeating subunits In eukaryotes, the DNA interacts with the histone proteins to form a tightly packed superstructure known as chromatin.— Isao Tanaka et al. — see cell illustration — compare euchromatin, heterochromatin, nucleosome
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