Vitexin inhibits polyubiquitin synthesis by the ubiquitin-conjugating enzyme E2-25K.
Helms KM, Wilson RC, Ogungbe IV, Setzer WN, Twigg PD. Vitexin inhibits polyubiquitin synthesis by the ubiquitin-conjugating enzyme E2-25K. Nat Prod Commun. 2011 Oct; 6(10):1411-6.