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• 4XK4: e. coli transcriptional regulator rutr with dihydrouracil
• 2FVK: crystal structure of dihydropyrimidinase from saccharomyces kluyveri in complex with the substrate dihydrouracil (10.1074/JBC.M513266200 )
• 1UAQ: the crystal structure of yeast cytosine deaminase (10.1074/JBC.M300874200 )