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A 1 H nuclear magnetic resonance study of the complex of cytochrome P450cam-putidaredoxin has been performed. Isocyanide is bound to cytochrome P450cam in order to increase the stability of the protein both in the reduced and the oxidized state. Diprotein complex formation was detected through variation of the heme methyl proton resonances which have been assigned in the two redox states....
The 1 H-NMR study of diamagnetic cytochrome P450cam Fe II CO has been performed for the first time. Chemical shifts of the cysteinate fifth ligand protons and of several heme protons have been assigned through 1- and 2-dimensional spectra at 500 MHz. A substrate dependance has been observed for the resonance of the cysteinate proton detected in the high-field region.
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