4LCS:
reference: Crystal Structures of Vertebrate Dihydropyrimidinase and Complexes from Tetraodon Nigroviridis with Lysine Carbamylation: Metal and Structural Requirements for Post-Translational Modification and Function., Hsieh YC, Chen MC, Hsu CC, Chan SI, Yang YS, Chen CJ, J Biol Chem. 2013 Sep 4. PMID: 24005677

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