The Golgi apparatus functions in protein processing and sorting as well as in the synthesis of lipids and polysaccharides. Proteins are transported from the endoplasmic reticulum to the cis compartment of the Golgi. Distinct processing events take place as proteins move through the medial and trans compartments to the trans-Golgi network, where proteins are sorted and packaged into vesicles for transport to endosomes, the plasma membrane, or the exterior of the cell.
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