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. 2019 Mar 11;9:4066. doi: 10.1038/s41598-019-39343-7

Figure 4.

Figure 4

IFNβ impacts endogenous SKP2 in HeLa S3 cells. (A) HeLa S3 cells were treated with IFNβ (500 pM) for the time indicated and lysed. Levels of endogenous SKP2 and USP18 were analyzed by western blot of whole cell lysates. (B) HeLa S3 cells were transfected with control siRNA (siCTRL) or siRNA targeting USP18 or ISG15. Cells were treated with IFNβ for 24 h and compared with untreated cells. Lysates were analyzed by western blot with anti-SKP2, anti-USP18 or anti-ISG15 antibodies. IFIT1 protein was monitored as control of IFN stimulation. Boxed membranes: 20 x less cell lysate was used. SKP2 band was normalized to GAPDH. Results are reported as the ratio of SKP2 to GAPDH. The ratio obtained for unstimulated cells was set to 1. Long exposure: time extended 3×, after hiding the right portion of the membrane.