Regulation of spinach-leaf nitrate reductase by reversible phosphorylation

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    119 Citations (Scopus)


    Okadaic acid and microcystin (but not the inactive methyl esters of these toxins) prevented the rapid light-induced activation of nitrate reductase (NR) in intact spinach leaves. In vitro, nitrate reductase was inactivated by a protein kinase and activated by PP2A. The role of reversible protein phosphorylation in regulation of light-coupled cytoplasmic metabolism is discussed.

    Original languageEnglish
    Pages (from-to)121-126
    Number of pages6
    JournalBiochimica et Biophysica Acta (BBA) - Molecular Cell Research
    Issue number1
    Publication statusPublished - 1992


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