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Unformatted text preview: cells, the major MTOC is the centrosome . Centrosomes contain gamma tubulin. Gamma tubulin appears to play a key role in microtubule nucleation. Gamma tubulin rings serve as a start site or nucleation site for the growth of one microtubule. The centrioles, also found within the centrosome have no role in the nucleation of microtubules and their function remains somewhat of a mystery. [plant cells lack centrioles]...
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- Fall '10