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Proton hyperfine resonance assignments using the nuclear Overhauser effect for ferric forms of horse and tuna cytochrome c.
Authors:J D Satterlee and S Moench
Abstract:Proton hyperfine resonance assignments for cytochromes c from several species are currently being successfully pursued by several laboratories. These efforts focus mostly on the ferrous forms. In contrast to that work, we have pursued assignments of the proton hyperfine shifted resonances for horse and tuna ferricytochromes c. Our results indicate that assignments are nearly identical in those two proteins. Using the pre-steady state nuclear Overhauser effect, several additional assignments have been made for the tuna protein, whereas for the horse protein, the following protons have been assigned: heme 7, alpha CH2; heme 7, beta CH2; histidine 18, beta CH2 and alpha CH; and the methionine 80, beta CH2.
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