1LX7:
reference: Structure of Escherichia coli uridine phosphorylase at 2.0 A., Burling FT, Kniewel R, Buglino JA, Chadha T, Beckwith A, Lima CD, Acta Crystallogr D Biol Crystallogr 2003 Jan;59(Pt 1):73-6. PMID: 12499542

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