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How do proteins leave the cell?


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December 10, 2009 7:59AM

Proteins are so large that they require the interaction of vesicles on cell membranes to get out of cells. Some examples are; enzyme secretion, hormone secretion,neurotransmitter release. Basically they use vesicle formation to get transported into or out of the cell. And since vesicle forming is an energy requiring process it would be an exocytosis or endocytosis reaction.

But usually as an even simpler answer, cells do not usually take in proteins, they take in amino acids which then make their own proteins.