Table 4 illustrates the effects of the i.p administration of different doses of CZPF and cyclophosphamide on the lifespan of DLA bearing mice. Figures 11 and 12 illustrate the effects of the i.p administration of different doses of CZPF in comparison with CYP on the life span and tumour volumes in DLA-challenged mice. The gene discussed is PPIG; the disease is neoplasm.