How it works

MICROTUBULES Structure: - globulaire - tubuline alpha et beta. - association avec GTP - plus grand diamètre (25nm) — Polymérisation: Les conditions: - tubuline beta lié à du GTP Lieu - centriole Les étapes. 1. Formation d’hétérodimères avec tubuline alpha + beta 2. Formation protoF 3. Association de plusieurs protoF —> cylindre creux

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David Congiu
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BIOLOGIE CELULAIRE

Biologia
biologie
cellule
David Congiu
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Généralités: - Cytosquelette s’étend dans la cellule de la membrane plasmique jusqu'au niveau de la face interne du noyau. - Composé de trois structures protéiques: microfilaments d’actine, filaments intermédiaires et microtubules.
David Congiu
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MICROFILAMENT D'ACTINE Structure: - globulaire (actine G) - sillon chargé négativement ==> lien avec ATP - plus petit diamètre (5-8nm)
David Congiu
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FILAMENT INTERMÉDIAIRE Structure: - filamenteux ATTENTION, les monomères sont variables selon les cellules.
David Congiu
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