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The nature of the phosphate complex of sulphite oxidase from electron-paramagnetic-resonance studies
G N George1, R C Prince, C A Kipke
1Exxon Research and Engineering, Annandale, NJ.
The Biochemical Journal
|November 15, 1988
Abstract:
The phosphate complex of sulphite oxidase in the Mo(V) oxidation state was investigated by e.p.r. spectroscopy. Third-derivative spectra reveal a wealth of structural detail previously unobserved in this spectrum. Most notable is the presence of hyperfine coupling from two inequivalent I = 1/2 nuclei, which we tentatively attribute to two 31P nuclei. Unresolved hyperfine interactions from at least one exchangeable 1H nucleus are also present.