Membrane-bound potassium and magnesium ion-stimulated inorganic pyrophosphatase from roots and cotyledons of sugar beet ( Beta Vulgaris L.)

• Published in: Biochimica et biophysica acta Vol. 399; no. 2; pp. 356 - 363
• Main Author: Karlsson, Jan
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier B.V 13.08.1975
• Subjects: Adenosine Triphosphatases - metabolism; Cations, Monovalent; Cell Membrane - drug effects; Cell Membrane - enzymology; Enzyme Activation - drug effects; Hydrogen-Ion Concentration; Kinetics; Magnesium - pharmacology; Phosphates; Plants - enzymology; Potassium - pharmacology; Pyrophosphatases - metabolism; Subcellular Fractions - enzymology

1. 1. The 25 000–30 000 × g fraction from sugar beet leaf or roots contains, together with (Na + + K +)-activated ATPase, also K +-stimulated inorganic pyrophosphatase. 2. 2. This inorganic pyrophosphatase is also stimulated by Rb + and to a lesser degres by Li + and Na +. 3. 3. Na + is at the same...