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A
short cylindrical organelle, found in pairs arranged at right angles
to each other at the centre of a microtubule organizing centre (MTOC)
or centrosome, found in eukaryotes (except in higher plants). A centriole
is similar in structure to the basal body found at the base of eukaryotic
cilia and flagella and organises the axoneme, the bundle of microtubules
and other proteins forming the core of each cilium or flagellum. The
centrosome organizes formation of a spindle during mitosis or meiosis.
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