Abstract
1H NMR saturation transfer and nuclear Overhauser effect (NOE) measurements have been used together with two‐dimensional spectra to complete the assignment of the well resolved hyperfine shifted resonances in the spectrum of horse ferricytochrome c and obtain their shifts in the reduced protein. New assignments include the β‐CH2 protons of Met‐80, both ring protons of His‐18, and the α‐CH2 of Gly‐29 and δ‐CH2 of Pro‐30, which resonate surprisingly far upfield despite the absence of any Fermi contact contribution to the shift.