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Material from the nucleus of a cell, considered a single substance when first isolated in the late 1800s but later shown to consist of DNA and associated proteins.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
nuclein(nū′klē-ĭn) [L. nucleus, a kernel]
The breakdown product of the nucleoproteins of chromosomes.
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