A mutant of Escherichia coli defective in ribonucleosidediphosphate reductase. 1. Isolation of the mutant as a deoxyuridine auxotroph.

Alcohol Oxidoreductases Aminohydrolases Culture Media Deoxycytidine Deoxyribonucleotides/metabolism Deoxyuridine Escherichia coli/enzymology,isolation & purification Genetics, Microbial Mutation Phenotype Ribonucleotides/metabolism Thymidine Thymidylate Synthase Thymine Nucleotides/metabolism Trimethoprim Uracil Nucleotides/metabolism

Culture Media Deoxyribonucleotides Ribonucleotides Thymine Nucleotides Uracil Nucleotides Deoxycytidine Trimethoprim Alcohol Oxidoreductases Thymidylate Synthase Aminohydrolases Thymidine Deoxyuridine