SiRNA depletions of protein subunits of CCAPs. TZM-bl cells were transfected with control siRNA or siRNAs against indicated proteins for 72 hours. Cell lysates were prepared, and protein expression was analysed by immunoblots. β-actin was used as a loading control. (A) Panel shows expression of TPR in cells transfected with control or siRNA against TPR, WRNIP1, TTF2 and FBXO11; (B) Top and middle panels show expression level of TTF2 and FBXO11, respectively, in cells transfected with control or siRNA against WRNIP1, TTF2 or FBXO11; (C and D) Panels show expression of WRNIP1 and PPP1R10 in cells transfected with siRNAs against WRNIP1 and PPP1R10, respectively. (E) Graph shows cell viability following transfection of control or PP1R10 siRNAs; the data are the average of three independent experiments with viability of control normalized to 100.