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RRN7 yeast complementation assay with chimeric proteins containing (A) Rrn7 (grey) and TAF1B (red), (B) TFIIB (orange) or BRF1 (blue). (C) TFIIB and BRF1 yeast complementation assay with indicated Rrn7 domains (grey) in place of TFIIB or Brf1 domains. +++, WT growth; −, no growth.
