Comparative studies of the light modulation of nitrate reductase and sucrose-phosphate synthase activities in spinach leaves.

@article{Huber1992ComparativeSO,
  title={Comparative studies of the light modulation of nitrate reductase and sucrose-phosphate synthase activities in spinach leaves.},
  author={Steven C Huber and J. J. L. Huber and Wilbur H. Campbell and Margaret G. Redinbaugh},
  journal={Plant physiology},
  year={1992},
  volume={100 2},
  pages={706-12}
}
We recently obtained evidence that the activity of spinach (Spinacia oleracea L.) leaf nitrate reductase (NR) responds rapidly and reversibly to light/dark transitions by a mechanism that is strongly correlated with protein phosphorylation. Phosphorylation of the NR protein appears to increase sensitivity to Mg(2+) inhibition, without affecting activity in the absence of Mg(2+). In the present study, we have compared the light/dark modulation of sucrose-phosphate synthase (SPS), also known to… CONTINUE READING
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