BI110 Lecture Notes - Lecture 5: Dynein, Microtubule Organizing Center, Intermediate Filament

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19 Oct 2016
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Give things inside the cell something to be attached or anchored to. More than 1 type of protein makes up filaments. Bacteria also have cytoskeletons, but the components are named differently. Similar proteins are present (homologous structures), and a 4th component: mind-ra. Made of actin, a fairly small protein. A microfilament is a polymer made of the monomer, actin. Not very permanent, can very easily be de-polymerized. So that the filament can lengthen and shorten. Actin is also important to muscle contractions. Actin-myosin interaction myosin attaches to actin and consumes atp to assist in muscle contractions. Chloroplasts move in response to light along active microfilaments. When cells get too much light, the chloroplasts move along microfilaments to avoid the light. In the dark, chloroplasts stay at the surface, and these appear dark green. Different types of proteins, form thicker cables with multiple polymers. Much bigger and more permanent than microfilaments.

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