thus human activated n-ras gene may not be sufficient to confer metastatic behavior in nude mice and the metastatic ability of human melanoma dna transfected cells may be due to , among other possibilities , expression of other gene sequences from melanoma dna co-transfected with the n-ras oncogene , or to specific activated murine sequences switched on during the initial process of transfection .
C0086418
human
C0027260
n-ras oncogene