MICROFILAMENT D'ACTINE Structure: - globulaire (actine G) - sillon chargé négativement ==> lien avec ATP - plus petit diamètre (5-8nm) — Polymérisation: Les conditions: - KCl - Mg2+ - Actine lié à de l’ATP Les étapes. 1. Nucléation: étape lente, formation d’un trimère d’actine (amorce) 2. Elongation: étape très rapide, ajout des monomères par leur pôle négatif. 3. Équilibre dynamique

David Congiu

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

Email:lenoxakf@gmail com56514 90do5z.af1874lsor

FILAMENT INTERMÉDIAIRE Structure: - filamenteux ATTENTION, les monomères sont variables selon les cellules.

David Congiu

MICROTUBULES Structure: - globulaire - tubuline alpha et beta. - association avec GTP - plus grand diamètre (25nm)

David Congiu

My father, a refugee from Eastern Europe, was preparing a fraudulent marriage to an American citizen as a route to this country when he was sponsored, making fraud unnecessary. My wife's grandfather bought papers from another Chinese villager to be able to come to the United States.

Nicholas Kristof

I want to do good work, but having kids and a life outside of that is important, too. If you don't have anybody around who loves you, then what's it all for? You're just lonely in the end.

Josh Duhamel

Television and cable have become the new independent films, in a sense, for writers and actors to gravitate towards. That's why I like short films, too; I love doing readings, audio books, working with young filmmakers; anything that keeps you from getting blase about yourself or in a rut.

Campbell Scott

The Cross is not responsible for Gods love rather it was His love that conceived the Cross.

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I've done all of them except for Oprah. My shoes were on Oprah but they ran out of time so I wasn't on. I left my shoes in Chicago so they could put them on the show.

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Wake up. Work out. Kick ass. Repeat.

Unknown

I seemed to vow to myself that some day I would go to the region of ice and snow and go on and on till I came to one of the poles of the earth, the end of the axis upon which this great round ball turns.

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I love England. I don't really like places when they're too hot. It's my Celtic blood.

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When you see the political parties squabble, if a baby is not allowed to be born, all the other issues do not come into play.

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The arts, sciences, humanities, physical education, languages and maths all have equal and central contributions to make to a student's education.

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Life is not worth living unless you live it for the One who gave you life.

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The fine print in the President's Social Security proposal is that all present and future workers under age 55 will have their promised retirement benefits cut.

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Today is your own. Tomorrow perchance may never come.

Swami Sivananda

Once you're in charge of your job, your house, your children, getting the food on the table, doing all of this, all of the time, it'd be nice for someone else to be in charge for a bit maybe.

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The haunting of history is ever present in Barcelona. I see cities as organisms, as living creatures. To me, Madrid is a man and Barcelona is a woman. And it's a woman who's extremely vain.

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There are over 500,000 registered sex offenders across the country, and statistics have shown that the recidivism rate for those criminals is high.

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