4XP8:
reference: Structural analysis of a specialized type III secretion system peptidoglycan-cleaving enzyme., Burkinshaw BJ, Deng W, Lameignere E, Wasney GA, Zhu H, Worrall LJ, Finlay BB, Strynadka NC, J Biol Chem. 2015 Feb 12. pii: jbc.M115.639013. PMID: 25678709

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