A NEXAFS and mass spectrometry study of cysteine, cystine and insulin irradiated with intermediate energy (0.8keV) electrons

Pulsed Electron-Electron Double Resonance (PELDOR) and Electron Spin Echo Envelope Modulation (ESEEM) Spectroscopy in Bioanalysis

“…The fundamentals of the technique have also been reviewed by several authors. See for instance, Gaur et al (2013), Sedlmair (2011), Rehr and Albers (2000) and references therein. Excellent reviews on the application of NEXAFS to more specific subjects such as polymers (Ade and Urquhart 2002;Urquhart et al 1999), minerals (Henderson et al 2014), soils and plant sciences (Leinweber et al 2014;Lombi and Susini 2009;Solomon et al 2009) are available.…”

Are disulfide bonds resilient to double ionization? Insights from coincidence spectroscopy and ab initio calculations

“…In the past years, our group has been investigating the absorption and ionic fragmentation of sulfur-containing molecules aer core electron excitations 38 using synchrotron radiation, 39,40 high-energy electrons 41 and ions. 42 The excitation and ionization of core electrons may lead to breakage of chemical bonds and dissociation of molecules.…”

Dissociation Pathways in the Cysteine Dication after Site-Selective Core Ionization

“…In the 1980s ab initio calculations were made on the neutral ground state and its ionization potential, while photoelectron spectra were obtained by He(II) ionization . To the best of our knowledge, very few publications exist on the inner shell spectra of gas-phase cysteine, although studies have been made on adsorption of cysteine on surfaces. − Figure shows the geometric structure of the cysteine molecule. It has two oxygen atoms and three carbon atoms in different chemical environments which provides the possibility to distinguish them based on the electron binding energy …”