4Y42:
reference: Serendipitous crystallization and structure determination of cyanase (CynS) from Serratia proteamaculans., Butryn A, Stoehr G, Linke-Winnebeck C, Hopfner KP, Acta Crystallogr F Struct Biol Commun. 2015 Apr;71(Pt 4):471-6. doi:, 10.1107/S2053230X15004902. Epub 2015 Mar 21. PMID: 25849512

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