Proteins which are produced on the surface of the Rough endoplastic reticulum are folded and processed in the rough endoplastic reticulum.
the proteins are then transported from the rough endoplastic reticulum to the golgi apparatus in vesicles
Proteins are modified in the golgi apparatus
the golgi apparatus packages proteins into vesicles to be transported around the cells to where they are required. Some proteins, such as extra cellular enzymes, leave the cell by exocytosis.