Protein sorting involves directing proteins, which originate on ribosomes in the cytosol, to their appropriate cellular locations using specific amino acid sequences known as sorting signals. These sorting signals function like postcodes, guiding proteins to various organelles or membranes within the cell, such as the nucleus, peroxisomes, or the endoplasmic reticulum. The cell employs different types of transport mechanisms—gated, transmembrane, and vesicular—to move proteins to their correct destinations, ensuring proper cellular function.
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