linker DNA

link·er DNA

the DNA found between nucleosomes on chromatin; because it is not complexed to proteins as strongly as other forms of DNA, it is accessible to exonuclease hydrolysis.
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Another histone, H1, is located outside the nucleosomes at the so-called linker DNA, which connects the various 206-kDa disk-like nucleosomes.
The formation of 180-200-bp oligonucleosomes results from cleavage in this 20-40-bp linker DNA region between adjacent nucleosomes by calcium-dependent endonucleases (Fig.