The inhibition of chick embryo cell growth by medium obtained from cultures of Rous sarcoma cells

摘要: Abstract Rous sarcoma cells even in large numbers grow poorly when spread on the surface of a tissue culture dish unless normal are present majority. The can however to much greater extent than suspended soft agar. Conditioned medium obtained from support growth cells. For first few days after infection continue release substance as they had before infection, which enhances small chick embryo When infected undergo transformation however, which, at high concentrations, inhibits They also produce enhancing substance, but its presence only be detected effect inhibitory material is removed by dilution.