3QY2:
reference: The Structure of a Monomeric Mutant Cks Protein Reveals Multiple Functions for a Conserved Hinge-Region Proline., Balog ER, Saetern OC, Finch W, Hoeft CO, Thai V, Harvey SL, Kellogg DR, Rubin SM, J Mol Biol. 2011 Jun 17. PMID: 21704044

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