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Abstract. The chemical shifts of the methyl protons of protoporphyrin IX, which are readily assigned, are related to the structural features of the axial histidine ligands in heme proteins with bis-His or His-CN axial coordination (Bertini I, Luchinat C, Parigi G, Walker FA (1999) JBIC 4:515519). In the present paper, a module is developed which transforms the chemical shifts into a pseudo-potential...
The interaction of reduced rabbit cytochrome b5 with reduced yeast iso-1 cytochrome c has been studied through the analysis of 1H15N HSQC spectra, of 15N longitudinal (R1) and transverse (R2) relaxation rates, and of the solvent exchange rates of protein backbone amides. For the first time, the adduct has been investigated also from the cytochrome c side. The analysis of the NMR data was integrated...
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