in the present study we show that adhesion of normal rat liver epithelial cells ( rl34 ) to substratum coated with type i collagen ( collagen substratum ) is promoted by a factor involved in 80 % ammonium sulfate precipitated proteins from serum-free conditioned medium ( pcm ) of rat embryo fibroblasts .
C0041455
type i collagen
C0009325
collagen