6J4N:
reference: The novel metallo-beta-lactamase PNGM-1 from a deep-sea sediment metagenome: crystallization and X-ray crystallographic analysis., Park KS, Hong MK, Jeon JW, Kim JH, Jeon JH, Lee JH, Kim TY, Karim AM, Malik SK, Kang LW, Lee SH, Acta Crystallogr F Struct Biol Commun. 2018 Oct 1;74(Pt 10):644-649. doi:, 10.1107/S2053230X18012268. Epub 2018 Sep 19. PMID: 30279316

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