Resonance Raman evidence for Fe(IV) in compound II of horseradish peroxidase |
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| Authors: | Gopa Rakhit Thomas G Spiro Motoji Uyeda |
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| Institution: | Chemistry Department Princeton University Princeton, New Jersey 08540 USA;Albert Einstein College of Medicine Bronx, New York 10961 USA |
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| Abstract: | Resonance Raman spectra have been obtained for Compound II of horseradish peroxidase. Its prophyrin vibrational frequencies are consistent with a planar low-spin heme containing Fe(IV). The oxidation-state marker band is found at the unprecedentedly high value of 1382 cm?1. This band was also observed in solutions of myoglobin and cytochrome c peroxidase to which H2O2 had been added. No evidence was found for an actual FeO double bond in Compound II. |
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