1QY9:
reference: Crystal structure of E. coli yddE protein reveals a striking homology with diaminopimelate epimerase., Grassick A, Sulzenbacher G, Roig-Zamboni V, Campanacci V, Cambillau C, Bourne Y, Proteins 2004 May 15;55(3):764-7. PMID: 15103639

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