From the very first discovery of biological iron–sulfur clusters with EPR, the spectroscopy has been used to study not only purified proteins but also complex systems such as respiratory complexes, membrane particles and, later, whole cells.

The exciting applications of current research involving sulfur radicals in bonding theory, organic synthesis, polymer chemistry, materials science, and biochemistry are outlined. The present review highlights recent developments in the chemistry of sulfur radicals.

The advanced electron paramagnetic resonance (EPR) techniques, electron nuclear double resonance (ENDOR) and electron spin echo envelope modulation (ESEEM) spectroscopies, provide unique insights into the structure, coordination chemistry, and biochemical mechanism of Nature’s widely distributed iron-sulfur cluster (FeS) proteins.

Jun 1, 2015 · The advanced electron paramagnetic resonance (EPR) techniques, electron nuclear double resonance (ENDOR) and electron spin echo envelope modulation (ESEEM) spectroscopies, provide unique insights into the structure, coordination chemistry, and biochemical mechanism of nature's widely distributed iron–sulfur cluster (FeS) proteins.

Jan 1, 1992 · This chapter describes electron paramagnetic resonance (EPR) spectroscopy of iron–sulfur proteins. The first EPR experiments on biological systems were carried out along the same lines. Many spectra were taken as a function of the orientation of the magnetic field with respect to the axes of the hemoglobin crystals frozen in their mother liquor.

The electron paramagnetic resonance (EPR) spectrum from the [4Fe-4S] (3+) cluster in several high-potential iron-sulfur proteins (HiPIPs) is complex: it is not the pattern of a single, isolated S=1/2 system.

Jul 23, 2021 · Continuous-wave (CW) electron paramagnetic resonance (EPR) spectroscopy is a powerful ally in characterizing the multitude of redox-active iron-sulfur cluster-containing ([Fe-S]) species present in biological samples.

Feb 3, 2011 · Partial observation of the reconstituted C14A in a dimer form and detection of sulfuryl radical by EPR spectroscopy indicated a thiyl radical on Cys11, a unique cysteinyl residue in rC552 C14A.

Jun 1, 2007 · An EPR spectrum from a 33 S-enriched sample will be dominated by two equivalent nitrogen and two equivalent sulfur hfc’s, and, thus, should be easily recognizable. To our knowledge, no investigation of the electrochemical oxidation of S …

Feb 21, 2018 · From the very first discovery of biological iron–sulfur clusters with EPR, the spectroscopy has been used to study not only purified proteins but also complex systems such as respiratory complexes, membrane particles and, later, whole cells.