we previously reported that proteins from serum-free conditioned medium ( pcm ) of rat embryo fibroblasts promote the adhesion of nonmalignant rat liver epithelial cells ( rl34 ) seeded on a collagen substratum ( yamada , m. and okigaki , t. , cell biol . int . rep. 7 , 1115 ( 1983 ) ) .
C0007577
the adhesion
C0009325
collagen