However, the growth of some tumor cells was not influenced by F16: v-Ha-ras-oncogene expressing mouse cancer cells (e.g., AC/Balb12, AC/Balb14, AC/Balb6.6, AC/p53− #16, and AC/p53− #19 for fibrosarcoma, AC260 for jaw cancers, AC99 for neck cancers, AC222 and AC/p53− 4782 for intestinal cancers, and AC/p53− #1 for salivary cancers), c-myc-oncogene expressing mouse breast cancer cells (e.g., 16MB9a, Myc 83, M158, and 13MA1a), and human breast cancer cells (e.g., MDA-MB-231 and MDA-MB-435). This evidence concerns the gene MYC and fibrosarcoma.