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Unformatted text preview: Most plastids come from other platids Microtubials Look relatively stiff and straight and hollow, tube like. They are made of protein, protein starts off as a sheet and then it curles into a tube. Larger than the microphilaments. They play a key role in cell-support Microphilaments Thinner and more flexible than microtubials. They are not hollow, they are more solid. They play a vital role in muscle-contraction....
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- Spring '07