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From Biology-Online Dictionary | Biology-Online Dictionary
noun, plural: linker DNAs
DNA linking adjacent nucleosome core particles
A linker DNAs is a stretch of DNA linking a nucleosome core with another (similar to a "beads and string" model). Nucleosomes, in turn, are packed together to form a chromatin fiber.
Since linker DNAs are not complexed to proteins they are readily removed through exonuclease hydrolysis.