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. 2021 May 6;13(9):2235. doi: 10.3390/cancers13092235

Figure 5.

Figure 5

The development of protein-targeting chimeric molecules (PROTACs). Small molecules possessing an E3 ligase recognition motif and a ligand designed for a specific target protein. PROTACs recruit E3 ligases and acts as a bridge between the E3 ligase and target protein, allowing the addition of K48-linked ubiquitin chains and subsequent proteasome-mediated degradation of the target protein.