title: Some characteristics of nystatin-resistant sterol mutants of Candida albicans.
abstract: Various stable, auxotrophic and nystatin-resistant sterol mutants of Candida albicans were isolated after nitrosoguanidine treatment. Sterol mutants were divided into groups on the basis of the ultraviolet spectra and thin-layer chromatographic patterns of their nonsaponifiable sterol extracts. They were further characterized by their conductometrically measured nystatin-induced ion release. These sterol mutants displayed a decreased growth yield and an increased cell volume. On media containing 0.01% of the carbon sources, most of them could assimilate glycerol, alpha-methyl-D-glucoside, DL-lactic acid, L-sorbose, L-arabinose and ribitol only to a significantly reduced extent, or not at all. It is presumed that these properties result from the altered sterol composition of the plasma membrane.
mesh_terms: D002176:Candida albicans / Q000187:drug effects / Q000235:genetics* / Q000378:metabolism; D002462:Cell Membrane / Q000378:metabolism; D004352:Drug Resistance, Microbial; D009154:Mutation; D009761:Nystatin / Q000494:pharmacology*; D013261:Sterols / Q000032:analysis*
chemical_list: D013261:Sterols; D009761:Nystatin