Conversion of light into chemical free energy through chlorophyllin-sensitized photoreduction of oxidized nicotinamide adenine dinucleotide phosphate by cytochrome c

Biochemistry ◽  
1969 ◽  
Vol 8 (7) ◽  
pp. 2970-2974 ◽  
Author(s):  
Shu-I Tu ◽  
Jui H. Wang
Keyword(s):  
Free Energy ◽  
Cytochrome C ◽  
Nicotinamide Adenine Dinucleotide ◽  
Nicotinamide Adenine Dinucleotide Phosphate ◽  
Nicotinamide Adenine ◽  
Chemical Free Energy

AMMONIUM OXIDATION BY CELL-FREE EXTRACTS OF ASPERGILLUS WENTII

1964 ◽  
Vol 42 (7) ◽  
pp. 989-998 ◽  
Author(s):  
M. I. H. Aleem ◽  
H. Lees ◽  
R. Lyric
Keyword(s):  
Cytochrome C ◽  
Nicotinamide Adenine Dinucleotide ◽  
Nicotinamide Adenine Dinucleotide Phosphate ◽  
Heterotrophic Nitrification ◽  
Nicotinamide Adenine ◽  
Ammonium Oxidation ◽  
Aspergillus Wentii ◽  
Similarities And Differences

Cell-free extracts of Aspergillus wentii were found to catalyze the oxidation of ammonium to nitrate; small quantities of hydroxylamine and nitrite accumulated during the oxidation. The oxidations of hydroxylamine to nitrite and of nitrite to nitrate apparently took place through the respective cytochrome c reductases. Added nicotinamide adenine dinucleotide phosphate and mammalian cytochrome c stimulated the oxidations of ammonium, hydroxylamine, and nitrite. Added iron increased the rate of nitrate formation from ammonium. Allylthiourea did not inhibit ammonium oxidation. The similarities and differences between autotrophic and heterotrophic nitrification are discussed.

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