Ubiquitin Ligases and Cancer.- The 26S Proteasome as a Therapeutic Target in Cancer: Beyond Protease Inhibitors?.- Targeting HAUSP: Killing Two Birds with One Stone.- Modulation of Protein Stability: Targeting the VHL Pathway.- Interrelationship of the Fanconi Anemia/BRCA Pathway.- Targeting the Sumoylation Pathway.- Proteasome Inhibitors.- Targeting Deubiquitinating Enzymes.- Proteolysis Targeting Chimeric Molecules.