title: The sterols of growth and stationary phases of Aspergillus nidulans cultures.
abstract: The accumulation of 4-desmethyl and 4,4-dimethyl sterols, as well as the triterpenoid beta-amyrin, was analysed during both exponential and stationary phases of Aspergillus nidulans growth. Throughout growth, the amount of 4-desmethyl sterol was proportional to the cellular dry weight, while the dimethyl sterols and beta-amyrin stopped accumulating after day 2. The sterols were found primarily as the free alcohol and not as fatty acid esters, the glycosides, or acyl glycosides. The amount of beta-amyrin in stationary phase cultures was affected by the concentrations of Mg2+ and Cu2+.
mesh_terms: D001233:Aspergillus nidulans / Q000254:growth & development*; D002849:Chromatography, Gas; D004875:Ergosterol / Q000378:metabolism; D007810:Lanosterol / Q000031:analogs & derivatives / Q000378:metabolism; D009828:Oleanolic Acid / Q000031:analogs & derivatives; D013261:Sterols / Q000378:metabolism*; D014315:Triterpenes / Q000378:metabolism
chemical_list: D013261:Sterols; D014315:Triterpenes; D007810:Lanosterol; D009828:Oleanolic Acid; C015316:lanostenol; C036380:beta-amyrin; D004875:Ergosterol