scholarly journals Mo(V) Electron Paramagnetic Resonance Signals from the Periplasmic Nitrate Reductase of Thiosphaera Pantotropha

1994 ◽  
Vol 226 (3) ◽  
pp. 789-798 ◽  
Author(s):  
Brian Bennett ◽  
Ben C. Berks ◽  
Stuart J. Ferguson ◽  
Andrew J. Thomson ◽  
David J. Richardson
1976 ◽  
Vol 155 (1) ◽  
pp. 201-203 ◽  
Author(s):  
R C Bray ◽  
S P Vincent ◽  
D J Lowe ◽  
R A Clegg ◽  
P B Garland

Studies on the respiratory nitrate reductase (EC 1.7.99.4) from Escherichia coli K12 by electron-paramagnetic-resonance spectroscopy indicate that its molybdenum centre is comparable with that in other molybdenum-containing enzymes. Two Mo(V) signals may be observed; one shows interaction of Mo(V) with a proton exchangeable with the solvent and has: A (1H) 0.9-1.2mT; g1 = 1.999; g2=1.985; g3 = 1.964; gav. = 1.983. Molybdenum of both signal-giving species may be reduced with dithionite and reoxidized with nitrate.


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