by means of both immunostaining ( intercalated ducts were positive for keratin and s-100 protein ; acinar cells were negative for both antigens ) and electron microscopy , flattened-to-cuboidal intercalated duct cells were noted to enclose and , presumably , to be involved in the formation of microcystic spaces .
C1512817
intercalated ducts
C1883279
intercalated duct cells