1J3G:
reference: NMR structure of Citrobacter freundii AmpD, comparison with bacteriophage T7 lysozyme and homology with PGRP domains., Liepinsh E, Genereux C, Dehareng D, Joris B, Otting G, J Mol Biol 2003 Apr 4;327(4):833-42. PMID: 12654266

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