by using 125i-labeled pfn , we show that a substratum incubated with pfn adsorbs approximately 0.4 microgram/cm2 pfn ( a monomolecular layer ) , and one incubated with medium containing serum adsorbs approximately 7 ng/cm2 pfn ( a 12-fold enrichment relative to a random selection of the soluble proteins ) .
C0229671
serum
C0032105
pfn