1U9P:
reference: Consolidating critical binding determinants by noncyclic rearrangement of protein secondary structure., Tabtiang RK, Cezairliyan BO, Grant RA, Cochrane JC, Sauer RT, Proc Natl Acad Sci U S A 2005 Feb 15;102(7):2305-9. Epub 2005 Feb 2. PMID: 15689399

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