2PY2:
reference: Structure and Evolutionary Origin of Ca-Dependent Herring Type II Antifreeze Protein., Liu Y, Li Z, Lin Q, Kosinski J, Seetharaman J, Bujnicki JM, Sivaraman J, Hew CL, PLoS ONE. 2007 Jun 20;2:e548. PMID: 17579720

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