2Y2B:
reference: Crystal Structures of Bacterial Peptidoglycan Amidase AmpD and an Unprecedented Activation Mechanism., Carrasco-Lopez C, Rojas-Altuve A, Zhang W, Hesek D, Lee M, Barbe S, Andre I, Ferrer P, Silva-Martin N, Castro GR, Martinez-Ripoll M, Mobashery S, Hermoso JA, J Biol Chem. 2011 Sep 9;286(36):31714-22. Epub 2011 Jul 20. PMID: 21775432

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