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Updated: Aug 5, 2026

Monitoring the Reductive and Oxidative Half-Reactions of a Flavin-Dependent Monooxygenase using Stopped-Flow Spectrophotometry
Published on: March 18, 2012
Oxygen transfer reactions by synthetic analogues of iron-bleomycin
D Y Dawson1, S E Hudson, P K Mascharak
1Department of Chemistry and Biochemistry, University of California, Santa Cruz 95064.
Abstract:
Synthetic analogues of the iron-bleomycins, namely [Fe(PMA)]2+ and [Fe(PMA)]+, have been studied as oxotransfer agents. Oxygen transfer has been observed using iodosobenzene (PhIO), hydrogen peroxide, and dioxygen as oxygen sources. The primary substrates were cis- and trans-stilbene. The products were determined to be cis- and trans-stilbene oxide, benzaldehyde, and deoxybenzoin. These products were recovered in ratios similar to those reported for the iron-bleomycins, albeit in lower yields. Iron complexes of simpler analogues are inactive as oxotransfer agents. This study provides further support that PMAH is an accurate model of the metal binding region of bleomycin.
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