PARACHROMATIN Meaning and
Definition
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Parachromatin refers to the region of chromatin within the cell nucleus that plays a crucial role in the organization and compaction of DNA. Chromatin is the complex of DNA, proteins, and RNA that forms the genetic material in a eukaryotic cell. Parachromatin is one of the two main components of chromatin, the other being euchromatin.
Parachromatin is characterized by its tightly-packed and condensed structure, which enables the DNA to be compactly folded and stored in the nucleus. It is rich in DNA and contains highly repetitive sequences that are involved in the control of gene expression and regulation. The primary function of parachromatin is to maintain the stability and integrity of the genome by preventing DNA damage and protecting it from environmental factors.
The organization and structure of parachromatin are regulated by various proteins, including histones, which play a fundamental role in DNA packaging. These proteins interact with the DNA strands, forming nucleosomes and higher-order chromatin structures. Together with other regulatory factors, these proteins help control the accessibility of DNA to various cellular processes, such as transcription and replication.
Overall, parachromatin plays a crucial role in maintaining the structural integrity and stability of the genome. It functions as a scaffold for DNA organization and compaction, contributing to the regulation of gene expression and other essential cellular processes.
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The chromatin of the spindle-figure in caryocinesia.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
Common Misspellings for PARACHROMATIN
- oarachromatin
- larachromatin
- -arachromatin
- 0arachromatin
- pzrachromatin
- psrachromatin
- pwrachromatin
- pqrachromatin
- paeachromatin
- padachromatin
- pafachromatin
- patachromatin
- pa5achromatin
- pa4achromatin
- parzchromatin
- parschromatin
- parwchromatin
- parqchromatin
- paraxhromatin
- paravhromatin
Etymology of PARACHROMATIN
The term "parachromatin" is a combination of two Greek words: "para", meaning beside or near, and "chroma", meaning color. "Chromatin" refers to the material that makes up chromosomes, consisting of DNA, RNA, and proteins. Thus, "parachromatin" can be understood as the portion of chromatin that is located adjacent to or near the highly condensed, deeply staining regions known as heterochromatin.
