4Y1L: Ubc9 Homodimer The Missing Link In Poly-Sumo Chain Formation
reference: RWD Domain as an E2 (Ubc9)-Interaction Module., Alontaga AY, Ambaye ND, Li YJ, Vega R, Chen CH, Bzymek KP, Williams JC, Hu W, Chen Y, J Biol Chem. 2015 Apr 27. pii: jbc.M115.644047. PMID: 25918163

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