4AMH:
reference: Tolerance of protein folding to a circular permutation in a PDZ domain., Hultqvist G, Punekar AS, Morrone A, Chi CN, Engstrom A, Selmer M, Gianni S, Jemth P, PLoS One. 2012;7(11):e50055. doi: 10.1371/journal.pone.0050055. Epub 2012 Nov 21. PMID: 23185531

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