Nucleolus

Japanese: 核小体 - かくしょうたい
Nucleolus
Also called nucleolus. A small body found in the nucleus of a cell. It contains ribosomal particles and stains well with basic dyes. One to several are contained in one nucleus. It is generally spherical, with a diameter of 1 to several μm. Its structure varies depending on the species of organism, but it usually consists of small granules of 10 to 30 nm, elongated fibrous structural regions, and alveolar parts. Its main components are proteins, DNA, and RNA. It is involved in the synthesis of ribosomal RNA and the assembly of ribosomes.
→ Related topics Nucleus (biology)

Source : Heibonsha Encyclopedia About MyPedia Information

Japanese:
仁とも。細胞の核内に見られる小体。リボソーム粒子を含むので,塩基性色素によく染まる。1個の核に1〜数個含まれる。一般に球形で,直径1〜数μm。構造は生物の種によって異なるが,普通,10〜30nmの小顆粒(かりゅう),細長い繊維構造域,胞状部などからなる。タンパク質,DNA,RNAなどが主成分。リボソームRNAの合成とリボソームの組立てにかかわっている。
→関連項目核(生物)

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