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  • Title: Nitrous oxide as end product of denitrification by strains of fluorescent pseudomonads.
    Author: Greenberg EP, Becker GE.
    Journal: Can J Microbiol; 1977 Jul; 23(7):903-7. PubMed ID: 195699.
    Abstract:
    Growing cultures of several strains of Pseudomonas fluorescens and Pseudomonas chlororaphis produced N2O as the only detectable gaseous product of denitrification, and other strains produced N2 as the gaseous end product of denitrification. All of the nitrogen in NO3- or NO2- added to cell suspensions of the N2O-producing strains P. fluorescens PJ 185 and P. chlororaphis B-560 was recovered as N2O. All of the nitrogen in NO3- or NO2- added to cell suspensions of the N2-producing strain P. fluorescens PJ70 was converted to N2. Cell extracts of P. fluorescens PJ 70, PJ 185, and P. chlororaphis B-560 exhibited NO3- reductase activity when sodium succinate was the electron donor. Reduced nicotinamide adenine dinucleotide and flavine adenine dinucleotide were required to demonstrate NO2- reductase activity in cell extracts.
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