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Unformatted text preview: but overlapping enzyme components. Cisternae carry distinct glycosyl modifying enzymes. 2. Protein traffic within the Golgi progresses by a process of cisternal maturation very much like the assembly of an automobile on an assembly line. 3. Golgi membrane proteins within cisternae that mature are continuously recycled in COPI vesicles back to an earlier cisterna. 4. Proteins destined for secretion are packaged into several distinct carrier vesicles: a. Regulated granules carry hormones that are processed by special proteases. b. Vesicles transported constitutively to the cell surface and to specialized domains of the cell surface....
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