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  • noun

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one of a pair of small cylindrical cell organelles near the nucleus in animal cells

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To undergo duplication, the orthogonal association of centrioles is lost and the amount of [gamma]-tubulin decreases by about one-third to one-fifth.
Although superficially similar to the centrosomes of algal and animal cells, POs are not permanent cell organelles and they do not contain centrioles.
Surrounding the centrioles is a ring of seven irregularly shaped, modified mitochondria (about 0.
Scale bar: 500 nm; 11, microgamont (MIC) with peripherally arranged nuclei (N), without nucleoli, note the presence of mitochondrion (MI) and centriole (C) in the vicinity of the nuclei.
elegans oocytes lack centrioles and astral microtubules.
Centrin is a Conserved Protein that Forms Diverse Associations with Centrioles and MTOCs in Naegleria and Other Organisms [Review].
Now we know the origin of centrioles from the sperm cell at fertilization in humans (13) and in most animals from roundworms to primates, that obey Boveri's rule (4).
During early mitotic prophase, the centrioles begin to migrate laterally and the nuclear membrane begins to break down.
In this region, representing a rather disordered open rhabdom, centrioles were found (Fig.
The nucleus is in constant communication with each mitochondrion, centriole, Golgi apparatus, ribosome, and endoplasmic reticulum, each of which has its own function in maintaining the overall homeostasis of the cell (see diagram 3): the nucleus contains the nucleolus and houses DNA ; the mitochondrion supplies the cell with energy; centrioles are important for cell division; the Golgi apparatus stores proteins; ribosomes are the sites for protein synthesis; the endoplasmic reticulum expedites the transport of cellular material; the plasma membrane permits materials to move into and out of the cell.
The differences in the shape of spermatozoa, the number of mitochondria, the arrangement of centrioles, as well as the occurrence of lateral flagellar ribbons among teleost species may have consequences in the swimming behavior with respect to sperm velocity, swimming types, and the head detachment (Lahnsteiner and Patzner, 1995).
coordinated transport of chromosomes to the centrioles during mitosis); between adjacent cells (e.
Previous research suggested that NC associate closely with centrioles and only exist during early interphase, which is identified by the presence of a midbody during cytokinesis between daughter cells.
Within the cytoplasm of the cell exists the nucleus, organelles, golgi bodies, lysosomes, endoplasmic reticulum, and centrioles (Tortora, 1976) (Figure II, IIIB, and IV).
We have proposed physicochemical mechanisms based upon electrostatics which explain and unify the basic motions during mitosis and cytokinesis: (1) centrioles to poles, (2) chromosomes to metaphase "plate", (3) alignment of chromosomes, (4) anaphase A motion of chromosomes, (5) rounding up of cells, (6) cell elongation, and (7) furrowing.