TP53 and neoplasm: Likewise, no significant difference was observed between WT and Trp53ΔAS/ΔAS fibroblasts in assays for cell cycle control (Figure 1E, Figure 1—figure supplement 1E), expression of well-known p53 target genes (Figure 1F, Figure 1—figure supplement 1F and G), proliferation under hyperoxic conditions (Figure 1G), or the growth of tumor xenografts (Figure 1H).