although these new phospholipids have been found in intact cells , pi-3,4-p2 and pip3 appear only after stimulation of quiescent cells with growth factors such as platelet-derived growth factor ( auger , k. r. , serunian , l. a. , soltoff , s. p. , libby , p. , and cantley , l. c. ( 1989 ) cell 57 , 167-175 ) and after transformation by certain oncoproteins ( l. a. serunian , k. r. auger , t. m. roberts , and l. c. cantley , manuscript in preparation ) .
C0018284
growth factors
C0032200
growth