Rabbit polyclonal antibodies against mouse UBTF, RPI large subunit (RPA194/Polr1A), and TAF1B were generated in the laboratory and have been previously described [25 (link)], anti-TAF1C was a gift from I. Grummt. All other antibodies were obtained commercially; anti-Fibrillarin (#LS-C155047, LSBio), anti-RPA135 (#SC-293272, Santa Cruz), anti-RPA194 (#SC-48385, Santa Cruz), anti-TBP (#ab818 and #ab51841, Abcam) and anti-FLAG M2 (F3165, Sigma).
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