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Transcription by RNA polymerase II (RNAPII) is a central process in eukaryotic gene regulation. While atomic details exist for the yeast RNAPII, characterization of the human complex lags behind, mostly due to the inability to obtain large quantities of purified material. Although the complexes have the same protein composition and high sequence similarity, understanding of transcription and of transcription-coupled...
The multisubunit transcription factor TFIID is essential for directing eukaryotic promoter recognition and mediating interactions with activators/cofactors during assembly of the preinitiation complex. Despite its central role in transcription initiation and regulation, structural knowledge of the TFIID complex has so far been largely limited to electron microscopy studies of negatively stained samples...
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