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.
Multiple functions and forms of higher plant nitrate reductase
โ Scribed by H.S. Srivastava
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 816 KB
- Volume
- 31
- Category
- Article
- ISSN
- 0031-9422
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๐ SIMILAR VOLUMES
The activities of nitrite reductase (EC 1.7.7.1) are 60-70% of wild-type activity in pigment-deficient leaves of the chloroplast-ribosomedeficient mutants 'albostrians' (Hordeum vulgare) and 'iojap' (Zea mays). The activity and apoprotein of nitrate reductase (EC 1.6.6.1.) are lacking in the barley
which is cytosolic, as if it were a plastidic protein. The appearance of NR3 depends on the plastidic factor in principally the same way as that of NR~ and NR2 whereas NR 4 is totally independent of the plastidic factor. The data document particular kinds of interaction between controlling factors