Abstract: | The uptake of 125I-insulin by rat pancreas was studied in vivo. Following fixation and light microscope autoradiography, saturable uptake of 125I-insulin was quantitatively demonstrated on acinar and duct cells but not on blood vessels and islets of Langerhans. Electron microscopy revealed the localization of 125I-insulin to the basolateral cell membranes of acinar and duct cells. |