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Studies on the regulation of assimilatory nitrate reductase in Ankistrodesmus braunii by J. Diez; A. Chaparro; J. M. Vega; A. Relimpio is a Agricultural and Biological Sciences article available to read on EtoBox.

What is Studies on the regulation of assimilatory nitrate reductase in Ankistrodesmus braunii about?

In the green alga Ankistrodesmus braunii, all the activities associated with the nitrate reductase complex (i.e., NAD(P)H-nitrate reductase, NAD(P)H-cytochrome c reductase and FMNH2-or MVH-nitrate reductase) are nutritionally repressed by ammonia or methylamine. Besides, ammonia or methylamine promote in vivo the reversible inactivation of nitrate reductase, but not of NAD(P)H-cytochrome c reductase. Subsequent removal of the inactivating agent from the medium causes reactivation of the inactive enzyme. Menadione has a striking stimulation on the in vivo reactivation of the inactive enzyme. The nitrate reductase activities, but not the diaphorase activity, can be inactivated in vitro by preincubating a partially purified enzyme preparation with NADH or NADPH. ADP, in the presence of Mg(2+), presents a cooperative effect with NADH in the in vitro inactivation of nitrate reductase. This effect appears to be maximum at a concentration of ADP equimolecular with that of NADH.

Who reads Studies on the regulation of assimilatory nitrate reductase in Ankistrodesmus braunii?

Author

J. Diez; A. Chaparro; J. M. Vega; A. Relimpio

Publisher

Springer-Verlag; Springer Verlag; Springer Science and Business Media LLC; Society for Mining, Metallurgy and Exploration Inc. (ISSN 0032-0935)

Published

1977

Language

EN

Field

Agricultural and Biological Sciences (Life Sciences)