Figure 5. JAK1 and STAT2 but not STAT1 are necessary for induction of ADAR1 expression by interferon alpha.
Western immunoblot analysis of ADAR1 p150 protein expression in WT and mutant MEF cell lines. Cells were either treated with IFN-αA/D (+) or left untreated (−). Nonidet P-40 cell free extracts were prepared and ~60 µg protein was analyzed by Western immunoblotting as described under Materials and Methods. (A) Cell-free extracts prepared from WT and mutant MEF cells genetically deficient in Sp3, Stat1, Jak1 or the IFNAR receptor (Rc) as indicated. (B) Cell-free extracts prepared from WT and mutant MEF cell lines genetically deficient in Stat1 or Stat2.

