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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
    Chromatin The major structures in DNA compaction: DNA, the nucleosome, the 11 nm beads on a string chromatin fibre and the metaphase chromosome Chromatin is a complex of DNA and protein responsible for condensing and packaging chromosomal DNA Chromatin is found in both bacterial [1] and eukaryotic cells [2]
  • Chromatin - National Human Genome Research Institute
    Chromatin The total DNA in the cell is about 5 to 6 feet long which has to fit inside the nucleus of a cell in an orderly fashion DNA molecules first wrap around the histone proteins forming beads on string structure called nucleosomes Nucleosomes further coil and condense gather to form fibrous material which is called chromatin Chromatin fibers can unwind for DNA replication and
  • What Is Chromatin and What Does It Do? - Biology Insights
    Explore how chromatin packages DNA within the nucleus This structure is also a dynamic system that regulates gene access and directs cellular processes
  • What is Chromatins Structure and Function? - ThoughtCo
    Chromatin is a mass of genetic material composed of DNA and proteins that condense to form chromosomes
  • Chromosomes vs Chromatids vs Chromatin: A Clear Guide for Students
    Learn the differences between chromosomes, chromatids, and chromatin, and understand homologous chromosomes and XX gender determination
  • Chromatin: Structure, Function, and Role in Gene Regulation
    Explore chromatin structure, organization, and its role in gene regulation, epigenetics, and cancer development
  • 3. 1: Chromatin and Chromosomes - Biology LibreTexts
    Learning Goals Explain how intermolecular forces between specific proteins and DNA help form nucleosomes, chromatin loops, and ultimately interphase chromosomes Compare and contrast euchromatin and heterochromatin, and explain how histone modification can act as a catalyst for chromatin remodeling to convert from one form to the other Explain how topologically-associated domains (TADs) and A
  • Chromatin - Simple English Wikipedia, the free encyclopedia
    Chromatin is the complex combination of DNA and proteins that makes up chromosomes [1][2] It is found inside the nuclei of eukaryotic cells Chromatin is divided into heterochromatin (condensed) and euchromatin (extended) forms [3][4] Heterochromatin is composed mostly of satellite DNA tandem repeats





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