The Golgi apparatus has been shown to be involved in the packaging of secretory proteins (Caro and Palade, 1964 ; Jamieson and Palace 1967 a, 1967 b), and in the production of acid mucopolysaccharides and glycoproteins (Neutra and Leblond, 1966 ; Berlin, 1967 ; Thiéry, 1967 ; Rambourg et al, 1969; Whur et al., 1969) . Other suggested functions of the Golgi apparatus include the formation of the...