2FU2:
reference: The structure of pyogenecin immunity protein, a novel bacteriocin-like immunity protein from Streptococcus pyogenes., Chang C, Coggill P, Bateman A, Finn RD, Cymborowski M, Otwinowski Z, Minor W, Volkart L, Joachimiak A, BMC Struct Biol. 2009 Dec 17;9(1):75. PMID: 20017931

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