Inactivation by ammonia of the photosynthetic reduction of nitrate in Nostoc muscorum particles. |
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| Authors: | T Ortega F Castillo J Cárdenas M Losada |
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| Institution: | Departamento de Bioquímica, Facultad de Ciencias y CSIC Universidad de Sevilla, Spain |
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| Abstract: | Ammonia, as well as other uncouplers of photophosphorylation, strongly inhibit the photosynthetic reduction of nitrate by particles of the blue-green alga Nostoc muscorum. The enzyme responsible for nitrate reduction, nitrate reductase, can be reversibly inactivated by reduction in a ferredoxin-dependent reaction. Nitrate protects against this inactivation, and molecular oxygen restores the original activity. |
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| Keywords: | CMU 3-(4-chlorophenyl)-1 1-dimethylurea MVH reduced methyl viologen nitrate reductase |
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