Similarly, synergistic antitumor activity was also observed when Meth A fibrosarcoma bearing mice were treated with 34 in combination with IFN‐α/β.194 Multiple injections of 34 (10 mg/kg) and IFN‐α/β (1.25 × 106 U/kg), both given three times per week following 2 weeks of treatment into Meth A fibrosarcoma bearing mice resulted in almost 50% tumor‐free mice. This evidence concerns the gene IFNA1 and neoplasm.