caa a22 4500 465822029 CHVBK 20180323112138.0 cr unu---uuuuu 170327e19900301xx s 000 0 eng 10.1007/BF00164743 doi (NATIONALLICENCE)springer-10.1007/BF00164743 Lipids of a citric-acid-producing Aspergillus niger strain grown in copper- and in manganese-supplemented media [Elektronische Daten] [Katarina Jernejc, Aleksa Cimerman, Mateja Vendramin, Anton Perdih] A citric-acid-producing Aspergillus niger strain was cultivated in conditions favouring citric acid biosynthesis and in conditions hindering it. During both extreme processes, the mycelia were analysed for their lipid content, individual lipid classes, the content of sterols and free fatty acids. Since phospholipids, especially phosphatidylcholine and sterols, play an essential role in membrane permeability one can conclude that the differences observed substantially contribute to citric acid excretion into fermentation media. The difference in sterol composition was the most pronounced. Citric-acid-excreting mycelia contained lower quantities of sterols and ergosterol was the only component. A. niger mycelia grown in conditions hindering citric acid accumulation contained higher amounts of sterols with ergosterol as the main component and six other sterol components representing a minor amount. Springer-Verlag, 1990 Jernejc Katarina Boris Kidrič Institute of Chemistry, Hajdrihova 19, 61115, Ljubljana, Yugoslavia aut Cimerman Aleksa Boris Kidrič Institute of Chemistry, Hajdrihova 19, 61115, Ljubljana, Yugoslavia aut Vendramin Mateja Boris Kidrič Institute of Chemistry, Hajdrihova 19, 61115, Ljubljana, Yugoslavia aut Perdih Anton Department of Chemistry and Chemical Technology, Edvard Kardelj University of Ljubljana, 61000, Ljubljana, Yugoslavia aut Applied Microbiology and Biotechnology Springer-Verlag 32/6(1990-03-01), 699-703 0175-7598 32:6<699 1990 32 253 https://doi.org/10.1007/BF00164743 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00164743 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Jernejc Katarina Boris Kidrič Institute of Chemistry, Hajdrihova 19, 61115, Ljubljana, Yugoslavia aut NATIONALLICENCE 700 1- Cimerman Aleksa Boris Kidrič Institute of Chemistry, Hajdrihova 19, 61115, Ljubljana, Yugoslavia aut NATIONALLICENCE 700 1- Vendramin Mateja Boris Kidrič Institute of Chemistry, Hajdrihova 19, 61115, Ljubljana, Yugoslavia aut NATIONALLICENCE 700 1- Perdih Anton Department of Chemistry and Chemical Technology, Edvard Kardelj University of Ljubljana, 61000, Ljubljana, Yugoslavia aut NATIONALLICENCE 773 0- Applied Microbiology and Biotechnology Springer-Verlag 32/6(1990-03-01), 699-703 0175-7598 32:6<699 1990 32 253 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer