Now showing items 1-5 of 5

    • Báez, Mauricio; Preller, Ana; Ureta, Tito (Academic Press Inc., 2003)
      Frog oocyte glycogen synthase properties differ significantly under in vitro or in vivo conditions. The Kmapp for UDP-glucose in vivo was 1.4mM (in the presence or absence of glucose-6-P). The in vitro value was 6mM and ...
    • Preller, Ana; Guixé Leguía, Victoria Cristina; Kessi, Eduardo; Ureta, Tito (1995)
      The characterization of fructose-1, 6-bisphosphatase in stage VI oocytes from the frog Caudiverbera caudiverbera, as well as the in vivo activity, is reported. The enzyme has a subunit molecular weight of approximately 43, ...
    • Kessi, Eduardo; Guixé Leguía, Victoria Cristina; Preller, Ana; Ureta, Tito (Portland Press Ltd, 1996)
      Glycogen is the main end product of glucose metabolism in amphibian oocytes. However, in the first few minutes after [U-14C]glucose microinjection most of the label is found in lactate. The burst of lactate production and ...
    • Guixé Leguía, Victoria Cristina; Preller, Ana; Kessi, Eduardo; Hofer, H. Werner; Ureta, Tito (1994)
      It is generally accepted that in frog full-grown oocytes glycolysis is absent and that carbon metabolic flux is largely directed to glycogen synthesis. Use of an anion exchange pellicular resin for analytical resolution ...
    • Guixé Leguía, Victoria Cristina; Preller, Ana; Kessi, Eduardo; Ureta, Tito (Academic Press Inc., 1997)
      Glycogen synthesis following glucose microinjection in frog oocytes proceeds preferentially by an indirect pathway involving gluconeogenesis from triose compounds. Because of the known regulatory role of fructose-2,6-bisP ...