2ZRR:
reference: Crystal structure and mutagenic analysis of a bacteriocin immunity protein, Mun-im., Jeon HJ, Noda M, Matoba Y, Kumagai T, Sugiyama M, Biochem Biophys Res Commun. 2009 Jan 16;378(3):574-8. Epub 2008 Dec 4. PMID: 19061861

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