An investigation of the triplet state of flavines and flavoproteins by optical detection of magnetic resonance

Thomas A Moore, Alvin L. Kwiram

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Abstract

The magnetic sublevels of the lowest excited triplet state of riboflavine, deazaflavine, FMN, FAD, and alloxazine, as well as two flavoproteins have been investigated by optical detection of magnetic resonance. Lifetimes, relative steady-state populations, relative radiative rate constants, as well as zero-field splitting parameters are re-ported for riboflavine and deazaflavine. This double resonance technique has been used to observe and characterize phosphorescence from flavodoxin and yeast hemoglobin and is shown to be a powerful technique for investigating the triplet electronic structure of weakly luminescent biological systems.

Original languageEnglish
Pages (from-to)5403-5407
Number of pages5
JournalBiochemistry
Volume13
Issue number26
Publication statusPublished - 1974

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ASJC Scopus subject areas

  • Biochemistry

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