Nuclear‐Magnetic‐Resonance Studies of Eukaryotic Cytochrome c

Abstract
The aliphatic regions of the nuclear magnetic resonance spectra of horse ferricytochrome c and horse ferrocytochrome c are described. Resonance assignments have been made using NMR double‐resonance techniques, spectral comparison of related proteins, the perturbing effects of extrinsic probes, and from knowledge of the X‐ray structure of cytochrome c. There are eight firmly assigned methyl resonances of ferrocytochrome c and seven firmly assigned methyl resonances of ferricytochrome c.