title: A requirement for an unconjugated pteridine for the growth of Paramecium aurelia.
mesh_terms: D002850:Chromatography, Gel; D003470:Culture Media; D003624:Darkness; D005492:Folic Acid / Q000378:metabolism; D008027:Light; D010247:Paramecium / Q000254:growth & development*; D011621:Pteridines / Q000378:metabolism*; D013050:Spectrometry, Fluorescence; D013936:Thymidine / Q000494:pharmacology
chemical_list: D003470:Culture Media; D011621:Pteridines; D005492:Folic Acid; D013936:Thymidine