2LX2:
reference: NMR structure note: a defective isoform and its activity-improved variant of a type III antifreeze protein from Zoarces elongates Kner., Kumeta H, Ogura K, Nishimiya Y, Miura A, Inagaki F, Tsuda S, J Biomol NMR. 2013 Feb;55(2):225-30. doi: 10.1007/s10858-012-9703-9. Epub 2013, Jan 4. PMID: 23288342

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