3BEG:
reference: A sliding docking interaction is essential for sequential and processive phosphorylation of an SR protein by SRPK1., Ngo JC, Giang K, Chakrabarti S, Ma CT, Huynh N, Hagopian JC, Dorrestein PC, Fu XD, Adams JA, Ghosh G, Mol Cell. 2008 Mar 14;29(5):563-76. PMID: 18342604

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