Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun The larger of two nuclei present in ciliate protozoans, which controls nonreproductive functions of the cell, such as metabolism.
from The Century Dictionary.
- noun A large nucleus which may subdivide into or be replaced by smaller nuclei.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun biology The larger of the two
nuclei present inciliate protozoans ; it controls thenonreproductive functions of the cell.
Etymologies
Sorry, no etymologies found.
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Examples
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Small RNAs produced by an RNAi-related mechanism are involved in DNA elimination during development of the somatic macronucleus from the germline micronucleus in Tetrahymena.
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The macronucleus is a long-beaded structure, or it may be in several parts connected by strands (Gruber).
Marine Protozoa from Woods Hole Bulletin of the United States Fish Commission 21:415-468, 1901 1906
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It's this other DNA that gets removed from the macronucleus: the macronucleus is a genes-only sort of place.
NYT > Home Page By OLIVIA JUDSON 2010
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It's this other DNA that gets removed from the macronucleus: the macronucleus is a genes-only sort of place.
NYT > Home Page 2010
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It's this other DNA that gets removed from the macronucleus: the macronucleus is a genes-only sort of place.
NYT > Home Page 2010
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It's this other DNA that gets removed from the macronucleus: the macronucleus is a genes-only sort of place.
NYT > Home Page By OLIVIA JUDSON 2010
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This process of gene assembly (assembling genes of macronucleus from their micronuclear form) is the most involved DNA processing known in living organisms. here
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One possibility is that the the macronucleus is not well-suited to reproduction, given that it carries a huge number of chromosomes and is polyploid to boot.
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The properties of these small RNAs can explain how the primary sequence of the parental macronucleus epigenetically controls genome rearrangement in the new macronucleus and provide the first demonstration of an RNAi-mediated process that directly alters DNA sequence organization.
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The macronucleus is horseshoe-shaped or ovoid and is situated in the posterior half of the body.
Marine Protozoa from Woods Hole Bulletin of the United States Fish Commission 21:415-468, 1901 1906
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