the types of cells analyzed included ( a ) cell lines derived from mouse mammary carcinomas of varying etiologies ( viral , hormonal , chemical carcinogen ) , ( b ) a series of clonal cells lines which were nontumorigenic at lower passage levels and tumorigenic at higher passage levels , ( c ) normal primary cells derived from the mammary glands of pregnant or lactating animals , and ( d ) primary cells from tumors produced by s.c. injection of cultured mammary tumor cells into syngeneic animals .
C0929301
mammary glands
C0006141
mammary