“…Whether this dilation simply means the accumulation of transport material is a matter of conjecture because uniform vacuolization of all cisternae has been evidenced in the Golgi apparatus of the epididymal epithelium (41). In addition, the dilatation with monensin treatment has also been reported in other cell types at concentrations of 0.1-25 ,uM over longer periods (5,11,17,19,20,22,31,40,42,43). The basis for the cisternal swelling produced by monensin may also be related to the ability of the ionophore to catalyze the exchange inward of a monovalent cation for the outward release of a proton.…”