In eukaryotic cells, secreted proteins are initially directed to the endoplasmic reticulum and then via the Golgi, where they are released into the extracellular environment through secretory vesicles. A more easier way would be for secretory protein-producing ribosomes to

Human Anatomy & Physiology (11th Edition)
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Chapter1: The Human Body: An Orientation
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In eukaryotic cells, secreted proteins are initially directed to the endoplasmic reticulum and then via the Golgi, where they are released into the extracellular environment through secretory vesicles. A more easier way would be for secretory protein-producing ribosomes to be localised to a translocon in the plasma membrane, with the protein being secreted directly during translation.

Consider three possible benefits of the more roundabout method for protein secretion versus the simpler, more straightforward approach indicated.

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