title: Isolation and characterization of substance in yeast extract which inhibits growth of thymine-less strains of Escherichia coli.
mesh_terms: D002855:Chromatography, Thin Layer; D003470:Culture Media; D004926:Escherichia coli / Q000187:drug effects* / Q000378:metabolism; D009154:Mutation / Q000187:drug effects*; D009705:Nucleosides / Q000494:pharmacology*; D013936:Thymidine / Q000378:metabolism; D013941:Thymine / Q000378:metabolism*; D015003:Yeasts / Q000032:analysis*
chemical_list: D003470:Culture Media; D009705:Nucleosides; D013941:Thymine; D013936:Thymidine