2R2Y:
reference: Ubiquitin docking at the proteasome through a novel pleckstrin-homology domain interaction., Schreiner P, Chen X, Husnjak K, Randles L, Zhang N, Elsasser S, Finley D, Dikic I, Walters KJ, Groll M, Nature. 2008 May 22;453(7194):548-52. PMID: 18497827

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