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Intrinsic proteins are the integral proteins inside the plasma membrane, or phospholipid bilayer, of a cell. The reason they are called intrinsic is because they cannot be released unless the membrane is disrupted.

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10y ago
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15y ago

Extrensic proteins are proteins withing the cytoplasmic membrane that aid in the transport of nutrients into the cell and waste out of the cell.

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7y ago

One of its main roles is to act as a structural component of cells and tissues.

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Q: What is the main role for proteins?
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