title: Nitrite activation of nitrate reductase in higher plants.
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.
authors.affiliation: Department of Biology, Ben Gurion University of the Negev, Beer Sheva, Israel.
authors.forename: D
authors.initials: D
authors.lastname: Kaplan
authors.forename: A M
authors.initials: AM
authors.lastname: Mayer
authors.forename: S H
authors.initials: SH
authors.lastname: Lips