title: Sulfur K-edge X-ray absorption spectroscopy for determining the chemical speciation of sulfur in biological systems.
abstract: Sulfur is an essential biological element, yet its biochemistry is only partially understood because there are so few tools for studying this element in biological systems. X-ray absorption spectroscopy provides a unique approach to determining the chemical speciation of sulfur in intact biological samples. Different biologically relevant sulfur compounds show distinctly different sulfur K-edge X-ray absorption spectra, and we show here, as an example, that this allows the deconvolution of the sulfur species in equine blood.
authors.affiliation: Stanford Synchrotron Radiation Laboratory, Stanford University, CA 94309, USA. pickering@ssrl.slac.stanford.edu
authors.forename: I J
authors.initials: IJ
authors.lastname: Pickering
authors.forename: R C
authors.initials: RC
authors.lastname: Prince
authors.forename: T
authors.initials: T
authors.lastname: Divers
authors.forename: G N
authors.initials: GN
authors.lastname: George
mesh_terms: D015502:Absorptiometry, Photon / Q000379:methods*; D000818:Animals; D006736:Horses; D013455:Sulfur / Q000097:blood* / Q000378:metabolism
chemical_list: D013455:Sulfur