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. 2019 Jun 1;33(11-12):705–717. doi: 10.1101/gad.322453.118

Figure 8.

Figure 8.

Model of how Ccr4–Not promotes Rpb1 ubiquitylation. Ccr4–Not promotes the recruitment of Rsp5 (E3) and Ubc4 (E2) through its RING domain to the core of RNAPII to position the E2–E3 pair and direct the ubiquitylation of Rpb1.