chicken embryo fibroblasts and hamster bhk cells transformed by rous sarcoma virus ( rsv ) release in their culture media growth factors which enhance markedly anchorage-independent colony formation in gelified medium , at the restrictive temperature ( 41 degrees 5 c ) , of chicken embryo fibroblasts ( cef ) infected by rsv mutants with a ts mutation of the src gene .
C0007634
cells
C0016030
fibroblasts