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chromatin    
n. 核染质,染色质

核染质,染色质

chromatin
n 1: the readily stainable substance of a cell nucleus
consisting of DNA and RNA and various proteins; during
mitotic division it condenses into chromosomes [synonym:
{chromatin}, {chromatin granule}]

Chromatin \Chro"ma*tin\, n. (Biol.)
The deeply staining substance of the nucleus and chromosomes
of eukaryotic cells, composed of DNA and basic proteins (such
as histones), the DNA of which comprises the predominant
physical basis of inheritance. It was, at the beginning of
the 20th century, supposed to be the same substance as was
then termed {idioplasm} or {germ plasm}. In most eukaryotic
cells, there is also DNA in certain plasmids, such as
mitochondria, or (in plant cells) chloroplasts; but with the
exception of these cytoplasmic genetic factors, the nuclear
DNA of the chromatin is believed to contain all the genetic
information required to code for the development of an adult
organism. In the interphase nucleus the chromosomes are
dispersed, but during cell division or meiosis they are
condensed into the individually recognizable chromosomes. The
set of chromosomes, or a photographic representation of the
full set of chromosomes of a cell (often ordered for
presentation) is called a karyotype.
[Webster 1913 Suppl.]


Chromatin \Chro"ma*tin\, n. [Gr. ?, ?, color.]
1. (Biol.) Tissue which is capable of being stained by dyes.
[archaic]
[1913 Webster]


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  • Chromatin - Wikipedia
    During mitosis and meiosis, chromatin facilitates proper segregation of the chromosomes in anaphase; the characteristic shapes of chromosomes visible during this stage are the result of DNA being coiled into highly condensed chromatin The primary protein components of chromatin are histones
  • Chromatin - National Human Genome Research Institute
    Chromatin refers to a mixture of DNA and proteins that form the chromosomes found in the cells of humans and other higher organisms Many of the proteins — namely, histones — package the massive amount of DNA in a genome into a highly compact form that can fit in the cell nucleus
  • What is Chromatins Structure and Function? - ThoughtCo
    Chromatin is a mass of genetic material composed of DNA and proteins that condense to form chromosomes during eukaryotic cell division Chromatin is located in the nucleus of our cells
  • Chromatin vs. Chromosomes: What’s the Difference and Why It Matters . . .
    Chromatin represents the intricate association of DNA with proteins residing in the nuclear compartment, while chromosomes emerge as highly condensed formations when cells undergo division These structures collaborate to maintain genomic integrity and facilitate hereditary information transfer
  • Chromatin: Definition, Composition, Function, Role And Location
    Chromatin is a type of genetic material composed of DNA and proteins It helps to pack the DNA into a small voluminous structure that can be contained within the nucleus
  • Chromosomes vs Chromatids vs Chromatin: A Clear Guide for Students
    Chromatin is the relaxed, thread-like form of DNA found in the nucleus when the cell is not dividing During cell division, chromatin condenses into visible chromosomes, which allow DNA to be efficiently separated between daughter cells
  • Chromatin - Definition and Examples - Biology Online Dictionary
    Chromatin is a substance made up of DNA or RNA and proteins, such as histones It condenses during cell division (mitosis or meiosis) and becomes a chromosome Chromatins are “unwound” condensed structures whereas chromosomes are highly packaged and more condensed than chromatins
  • Chromosomes and Chromatin - The Cell - NCBI Bookshelf
    Chromosome Numbers of Eukaryotic Cells The complexes between eukaryotic DNA and proteins are called chromatin, which typically contains about twice as much protein as DNA





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