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. 2020 Jan 21;9(2):266. doi: 10.3390/cells9020266

Figure 4.

Figure 4

Schematic representation of mechanisms of action of specific Pol I transcription inhibitors. (A) Mode of action of CX-3543, disruption of Nucleolin binding to G4 DNA structures. (B) Mode of action of CX-5461, disruption of Pol I-SL-1 interaction and an unclear role in G4 stabilization. (C) Mode of action of BMH-21, disruption of Pol I complex and ubiquitin-mediated proteasome degradation of POLR1A (RPS194), inhibition of transcription elongation and an unclear role in G4 stabilization.