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As the exogenous ligand-cytochrome c complexes were purported to represent models for the unfolding intermediate of cytochrome c, NMR spectroscopy has been utilized to study the azide adduct of horse heart cytochrome c. The structure of azidoferricytochrome c was modeled by restrained energy minimization using paramagenetic pseudocontact shifts as constraints. The bound azide moiety was found to be...
Abstract. The solution structure of cyanoferricytochrome c has been determined using NMR spectroscopy. As a result of including additional constraints derived from pseudocontact shifts, a high-resolution NMR structure was obtained with high accuracy. In order to study the conformational transition between the native protein and its ligand adducts, the present structure was compared with the solution...
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