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NMR structural characterization of the reduction of chromium(VI) to chromium(III) by cytochrome c7
SOLUTION NMR
NMR Experiment
Experiment
Type
Sample Contents
Solvent
Ionic Strength
pH
Pressure
Temperature (K)
Spectrometer
1
2D NOESY
2 mM cytochrome c7-chromium(III)
90% H2O, 10% D2O; 100 mM phosphate buffer
100 mM phosphate buffer
6.5
1 atm
298
NMR Spectrometer Information
Spectrometer
Manufacturer
Model
Field Strength
1
Bruker
DRX
700
NMR Refinement
Method
Details
Software
simulated annealing in torsion angle space
DYANA
NMR Ensemble Information
Conformer Selection Criteria
structures with best target function
Conformers Calculated Total Number
500
Conformers Submitted Total Number
35
Representative Model
1 (fewest violations)
Additional NMR Experimental Information
Details
The protein solution was titrated by addition of increasing amounts of the (CrO4)2- solution directly in the NMR tube. The (CrO4)2- solution was kept under argon atmosphere to avoid the presence of oxygen in the NMR tube.