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The induction of Stat-1 protein by IFN-γ is impaired in HPV31 cells. (A) Western blot analysis of equal amounts of protein lysates from NHKs and LKP31 cells treated with IFN-γ (1,000 U/ml) to detect Stat-1 protein level. The image in panel A was quantified by a densitometer, and the results are shown graphically in panel B.
