mammary epithelium from mid-pregnant mice was plated on confluent irradiated monolayers of 3t3-l1 cells , a subclone of the swiss 3t3 cell line that differentiates into adipocytes in monolayer culture and other cell monolayers ( 3t3-c2 cells , swiss 3t3 cells , and human foreskin fibroblasts ) .
C0007634
cell
C0016030
fibroblasts