Pairwise comparisons of Ras (A–C) and Tp53 (D–F) target gene expression among tree shrew, human, and mouse. A–C, Ras target genes; D–F, Tp53 target genes. The dendrograms (A) and (D) show 3 clear clusters of tree shrew, human, and mouse. The expression heatmaps (B and E) illustrate the correlation between the 3 species. C and F illustrate the average correlation between the heatmaps in (B) and (E), respectively. The error bars show the standard deviations. The 23 genes of Ras targets are RAC1, RHOA, RALA, RAF1, ABL1, RALGDS, RAB5A, RALBP1, TBK1, NFKB1, TIAM1, BAD, CDC42, MAPK3, ARF6, RAPGEF5, PLD2, REL, RIN1, PAK1, KSR1, PLD1, and PLA1A from top to bottom of heatmap. The sixty-four genes of p53 targets are S100A9, S100A8, ATF3, CCNB1, IER3, CDKN1A, RHOA, NFIC, E2F3, PSEN1, AKT1, MCM7, BTG2, TRIM26, PRKAB1, CHUK, RB1, ETS2, XPC, MSH2, HIPK2, CEBPA, PPP2R4, BAX, PIAS3, TBP, ING1, EZH2, BIRC5, CHGA, GDF15, THBS1, EGFR, IL6, STMN1, CX3CL1, PLK3, IGF2, TERT, CDC25C, E2F2, ESR1, BDKRB1, MDM2, UNC5B, FBLN1, PTHLH, ETS1, AMH, MMP13, WRN, CCNE1, CHEK2, BRCA1, CHEK1, CCNA1, EPHA2, POLD1, JAK2, FDXR, PML, PLK1, RAD51, and TK1 from top to bottom of heatmap. The Red/green values represent Pearson Correlation Coefficient between the heatmap. Hu:human; Ts: tree shrew; Mo: mouse.