title: Escherichia coli mutant lacking 4-thiouridine in its transfer ribonucleic acid.
abstract: A mutant of Escherichia coli has been isolated that lacks 4-thiouridine, a rare base in transfer ribonucleic acid. The mutant grows at the same rate as wild-type cells. It shows little near-ultraviolet-induced growth delay, thus supporting earlier hypotheses that 4-thiouridine in transfer ribonucleic acid is the chromophore for this growth delay.
mesh_terms: D004926:Escherichia coli / Q000032:analysis* / Q000254:growth & development; D009154:Mutation; D012329:RNA, Bacterial / Q000032:analysis*; D012343:RNA, Transfer / Q000032:analysis*; D013891:Thiouridine / Q000032:analysis*
chemical_list: D012329:RNA, Bacterial; D013891:Thiouridine; D012343:RNA, Transfer