title: Variations in ppGpp levels in Rhodopseudomonas spheroides during adaptation to decreased light intensity.
mesh_terms: D000220:Adaptation, Biological; D006150:Guanine Nucleotides / Q000032:analysis*; D007700:Kinetics; D008027:Light; D010761:Phosphorus Radioisotopes; D010788:Photosynthesis; D012329:RNA, Bacterial / Q000096:biosynthesis; D012335:RNA, Ribosomal / Q000096:biosynthesis; D013997:Time Factors; D014316:Tritium; D014529:Uridine / Q000378:metabolism
chemical_list: D006150:Guanine Nucleotides; D010761:Phosphorus Radioisotopes; D012329:RNA, Bacterial; D012335:RNA, Ribosomal; D014316:Tritium; D014529:Uridine