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Título: | Two interconvertible forms of yeast phosphofructokinase with different sensitivity to endproduct inhibition |
Autor: | Viñuela, Eladio; Salas, Margarita CSIC ORCID ; Sols, Alberto; Salas Falgueras, María Luisa CSIC | Fecha de publicación: | 1964 | Editor: | Elsevier | Citación: | Biochemical and Biophysical Research Communications 15: 243-249 (1964) | Resumen: | Activation and inhibition of phosphofructokinase (PFK) preparations from several animal tissues by a number o f metabolites has been recently reported. The very compli- cated kinetics observed have led to the suggestion o f a variety of regulatory binding sites in PFK (see Passonneau and Lowry, 1963). Inhibition by excess ATP-Mg has been recently characterized in this laboratory, with a yeast preparation, as endproduct inhibition that gives second order kinetics with respect to fructose-6-P in inhibitory conditions (Viiiuela et al., 1.963). Mansour and Mansour (1962) reported evidence for an activating system stimulated by cyclic 3', 5'-AMP with preparations from a liver fluke. More recently, Mansour (1963), has observed what seems to be a direct activation o f heart PFK by cyclic 3',5'-AMP. We report here the identification o f two forms o f yeast PFK, their interconversion, and an effect of cyclic 3'. 5'-APIP on a conversion enzyme. | Versión del editor: | http://dx.doi.org/10.1016/0006-291X(64)90154-8 | URI: | http://hdl.handle.net/10261/37864 | DOI: | 10.1016/0006-291X(64)90154-8 | ISSN: | 0006-291X |
Aparece en las colecciones: | (CBM) Artículos |
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