title: A second purine nucleoside phosphorylase in Escherichia coli K-12. I. Xanthosine phosphorylase regulatory mutants isolated as secondary-site revertants of a deoD mutant.
mesh_terms: D000483:Alleles; D001426:Bacterial Proteins / Q000235:genetics*; D002874:Chromosome Mapping; D002876:Chromosomes, Bacterial; D004926:Escherichia coli / Q000201:enzymology* / Q000235:genetics; D005786:Gene Expression Regulation; D005799:Genes, Dominant; D005809:Genes, Regulator; D009154:Mutation; D010430:Pentosyltransferases / Q000235:genetics*; D011683:Purine-Nucleoside Phosphorylase
chemical_list: D001426:Bacterial Proteins; D010430:Pentosyltransferases; C028449:xanthosine phosphorylase; D011683:Purine-Nucleoside Phosphorylase