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Nitrite Activation of Nitrate Reductase in Higher Plants

Overview
Journal Planta
Specialty Biology
Date 2014 Jan 14
PMID 24414047
Citations 3
Authors
D KAPLAN
A M Mayer
S H Lips
Affiliations
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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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