The following is a list of the steps involved in the process of secretion by the Golgi apparatus. What is the proper order for these steps? 1. Cisternae move from the forming face toward the maturing face. 2. Exocytosis 3. Products from RER are packaged into transport vesicles. 4. Secretory vesicles are formed at the maturing face. 5. Vesicles arrive at the forming face. 6. Enzymes modify arriving proteins and glycoproteins.