1S3M:
reference: Structural and functional characterization of a novel phosphodiesterase from Methanococcus jannaschii., Chen S, Yakunin AF, Kuznetsova E, Busso D, Pufan R, Proudfoot M, Kim R, Kim SH, J Biol Chem 2004 Jul 23;279(30):31854-62. Epub 2004 May 5. PMID: 15128743

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