Nitrite activation of nitrate reductase in higher plants |
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| Authors: | D. Kaplan A. M. Mayer S. H. Lips |
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| Affiliation: | (1) Department of Biology, Ben Gurion University of the Negev, Beer Sheva, Israel;(2) Present address: Department of Botany, Hebrew University of Jerusalem, Israel |
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| Abstract: | Comparative studies of nitrate-activated nitrate reductase (NR-NO2) and nitrate-induced nitrate reductase (NR-NO3) (EC 1.6.6.2) indicate that the enzymes differ in structure, heat stability, and pH dependence, but have the same cofactor requirment. NR-NO2 developes in barley (Hordeum vulgare L. var. Dvir) seedlings as NR-NO3 disappears. A transition from the active to the inactive form of nitrate reductase takes place. Nitrite seems to activate the inactive form of the enzyme. |
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| Keywords: | Hordeum Nitrite Nitrate reductase |
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