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Ybr137w is not essential for import of Rfa1 or Rfa2. Full-length Rfa1-GFP and Rfa2-GFP fusions were expressed in cells lacking the RPA-binding protein Ybr137w (ybr137wΔ) and in wild-type cells. Both Rfa1-GFP and Rfa2-GFP are localized to the nucleus with no change in localization in the absence of Ybr137w.
