25.3 Coated vesicles transport both exported and imported proteins Coated vesicles are vesicles whose membrane has on its surface a layer of a protein such as clathrin, cop-I or COP-II Endocytosis is process by which proteins at the surface of the cell are internalized, being transported into the cell within membranous vesicles Exocytosis is the process of secreting proteins from a cell into the medium, by transport in membranous vesicles from the endoplasmic reticulum, through the Golgi, to storage vesicles, and finally(upon a regulatory signal) through the plasma membrane Retrograde transport describes movement of proteins in the reverse direction in the reticuloendothelial system, typically from Golgi to endoplasmic reticulum 消当Coated vesicles are vesicles whose membrane has on its surface a layer of a protein such as clathrin, cop-I or COP-II. Endocytosis is process by which proteins at the surface of the cell are internalized, being transported into the cell within membranous vesicles. Exocytosis is the process of secreting proteins from a cell into the medium, by transport in membranous vesicles from the endoplasmic reticulum, through the Golgi, to storage vesicles, and finally (upon a regulatory signal) through the plasma membrane. Retrograde transport describes movement of proteins in the reverse direction in the reticuloendothelial system, typically from Golgi to endoplasmic reticulum. 25.3 Coated vesicles transport both exported and imported proteins