in an ultrastructurally and biochemically differentiated primary cell culture system in which mouse mammary epithelium is maintained on floating collagen gels , prolactin causes an increase in short-circuit current ( isc ) of monolayers of cells derived from midpregnant ( 24.6 to 48.0 microa . cm-2 ) and lactating ( 10.4 to 16.1 microa . cm-2 ) glands .
C0007589
differentiated
C0007634
cells