3RE1:
reference: Crystal structure of uroporphyrinogen III synthase from Pseudomonas syringae pv. tomato DC3000., Peng S, Zhang H, Gao Y, Pan X, Cao P, Li M, Chang W, Biochem Biophys Res Commun. 2011 May 20;408(4):576-81. Epub 2011 Apr 19. PMID: 21527255

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