3ULG:
reference: Flexibility of EF-hand motifs: Structural and thermodynamic studies of Calcium Binding Protein- 1 from Entamoeba histolytica with Pb2+, Ba2+, and Sr2+, Kumar S, Ahmed E, Kumar S, Khan RH, Gourinath S, BMC Biophys. 2012 Aug 20;5(1):15. PMID: 22906057

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