4B8C:
reference: Architecture of the nuclease module of the yeast ccr4-not complex: the not1-caf1-ccr4 interaction., Basquin J, Roudko VV, Rode M, Basquin C, Seraphin B, Conti E, Mol Cell. 2012 Oct 26;48(2):207-18. doi: 10.1016/j.molcel.2012.08.014. Epub 2012 , Sep 6. PMID: 22959269

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