Differential modulation of carboxylase and oxygenase activities of ribulose 1,5-bisphosphate carboxylase/oxygenase released from freshly ruptured spinach chloroplasts
Differential modulation of carboxylase and oxygenase activities of ribulose 1,5-bisphosphate carboxylase/oxygenase released from freshly ruptured spinach chloroplasts
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Date
1981-09-01
Authors
Raghavendra, Agepati S.
Carrillo, Nestor J.
Vallejos, Ruben H.
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Abstract
The carboxylase activity of ribulose 1,5-bisphosphate (RuBP) carboxylase/oxygenase released from freshly ruptured spinach chloroplasts was stimulated preferentially by Mg2+ while oxygenase activity was higher with Mn2+. Only Mg2+ could reactivate either activity of desalted enzyme. The results suggest that carboxylase and oxygenase activities of RuBP craboxylase/oxygenase can be modulated selectively by Mg2+ or Mn2+. © 1981 Oxford University Press.
Description
Keywords
Cation modulation,
CO2 fixation,
Ribulose 1,5-bisphosphate carboxylase/oxygenase,
Spinach chloroplasts
Citation
Plant and Cell Physiology. v.22(6)