4NU2:
reference: Structure-based characterization and antifreeze properties of a hyperactive ice-binding protein from the Antarctic bacterium Flavobacterium frigoris PS1., Do H, Kim SJ, Kim HJ, Lee JH, Acta Crystallogr D Biol Crystallogr. 2014 Apr 1;70(Pt 4):1061-73. doi:, 10.1107/S1399004714000996. Epub 2014 Mar 19. PMID: 24699650

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