Sometimes the reticulum branches out. Other times, the cisternae dilate and form large sacs that fill the cell. Distinguish the types of secretory pathways through the Golgi Complex. Give one example and state where it works in the process. Give a couple of examples of these proteins and their functions in the Rough endoplasmic reticulum By the end of this unit, you should be able to give examples of how signal sequences and patches help with the sorting and transport of proteins.
Signal patches dictate direction and placement of proteins in the membranes themselves.
Signal sequences promote return of resident ER proteins to ER via COPI coated vesicles. Peroxisomal enzymes are also sorted to new peroxisomes by signal.