| 释义 |
kinetoplastenUK
ki·net·o·plast K0066450 (kə-nĕt′ə-plăst′, -nē′tə-, kī-)n. A loop of DNA located in a large mitochondrion that lies near the base of the flagellum in certain protozoans.kinetoplast (kɪˈnɛtəˌplæst; -ˈniː-; -ˌplɑːst) n (Zoology) a small granular cell body close to the nucleus in some flagellate protozoans. Also called: kinetonucleus [C20: from Greek; see kinetic, -plast]KinetoplastenUK
kinetoplast[kə′ned·ə‚plast] (cell and molecular biology) A genetically autonomous, membrane-bound organelle associated with the basal body at the base of flagella in certain flagellates, such as the trypanosomes. Also known as parabasal body. Kinetoplast a cell organelle; the basal nodule of the cilia of infusoria. The origin of the kinetoplast is associated with the centriole, an assumption supported by the similarity in ultrastructure of the two organelles. In addition to proteins, carbohydrates, and lipids, the kinetoplast contains DNA and RNA and is capable of the independent biosynthesis of protein and of self-reproduction. Kinetoplasts may give rise to cilia or trichocysts. The tendency to call all basal bodies kinetoplasts is incorrect. kinetoplastenUK
kinetoplast [kĭ-ne´to-plast] an accessory body found in many protozoa, primarily the Mastigophora; it contains DNA and replicates independently.ki·ne·to·plast (ki-nē'tō-plast, ki-net'ō-), An intensely staining rod-shaped, diskoid, or spheric extranuclear DNA structure found in parasitic flagellates (family Trypanosomatidae) near the base of the flagellum, behind the blepharoplast, and often at right angles to the nucleus. Visible by light microscopy, electron micrographs reveal it as part of a single giant mitochondrion filling most of the cytoplasm of amastigote flagellates. Identifying kinetoplast as kDNA distinguishes it from nuclear DNA(nDNA). The kinetoplast divides independently, but with the basal body, before nuclear division. Kinetoplast formerly included parabasal body and blepharoplast in a locomotory apparatus but is now recognized as a distinct organelle of most trypanosomatids.
See also: parabasal body. [kineto- + G. plastos, formed] kinetoplast (kə-nĕt′ə-plăst′, -nē′tə-, kī-)n. A loop of DNA located in a large mitochondrion that lies near the base of the flagellum in certain protozoans.ki·ne·to·plast (ki-nē'tō-plast) An intensely staining extranuclear DNA structure found in parasitic flagellates near the base of the flagellum. Electron micrographs show it to be part of a single giant mitochondrion filling most of the cytoplasm of amastigote flagellates.
See also: parabasal body[kineto- + G. plastos, formed]kinetoplast see KINETOSOME. |