title: The nature of phenotypic reversions of deletion mutants with respect to thymidine-phosphorylase in Escherichia coli.
mesh_terms: D002869:Chromosome Aberrations; D003470:Culture Media; D004926:Escherichia coli / Q000201:enzymology*; D005809:Genes, Regulator; D009154:Mutation; D010430:Pentosyltransferases / Q000378:metabolism*; D010641:Phenotype; D013936:Thymidine; D014529:Uridine
chemical_list: D003470:Culture Media; D010430:Pentosyltransferases; D013936:Thymidine; D014529:Uridine