chick embryo ( ce ) fibroblasts and normal rat kidney ( nrk ) cells transformed by temperature-sensitive ( ts ) mutants of avian sarcoma virus ( ny68 , la23 , la24 , la25 , la29 , la31 , gi201 , gi202 , gi251 , gi253 induce tumors on the chorioallantoic membrane ( cam ) of chick eggs at temperatures that correspond to the permissive and nonpermissive temperatures used to induce conditional expression of the `` '' transformed '' '' phenotype in these cells when cultured in vitro .
C0016030
fibroblasts
C0007634
normal