(E) NFkappaB/phosphor-Ser536-NFKappaB levels in xenograft tumours developed in NOD-SCID mice (control or doxycycline-induced TRF2 in HT1080 cells; N=6 mice in each group) by immuno-flow cytometry; mean fluorescence signal from individual tumours in control or TRF2-induced tumours plotted in adjacent graph; activation shown as ratio of pSer536-p-NFkappaB over total NFkappaB; significance was calculated using Wilcoxon’s non-parametric test. The gene discussed is NFKB1; the disease is neoplasm.