TP53 and neoplasm: Student T-test analysis (n = 9/group) showed statistically significant differences in tumor size (p < 0.001) between palindromic tetrapeptide treated-virus (0.43 mm3), non-palindromic tetrapeptide control (9.5 mm3), saline control treated groups in H1299 mutant p53 (10.0 mm3), H1299 null p53 group (9.0 mm3) and non-palindromic tetrapeptide (9.5 mm3) (Figure 6A).