title: Resolving ligand hyperfine couplings of type 1 and 2 Cu(II) in ascorbate oxidase by high field pulse EPR correlation spectroscopy.
abstract: Ascorbate oxidase contains two paramagnetic Cu(ii) binding sites, type 1 (T1) and type 2 (T2) and in both sites the Cu(ii) is coordinated to histidine residues. We use several pulse EPR techniques at high field (95 GHz) to determine ligand (1)H and (14)N hyperfine couplings in the two sites and identify the T1 signals by a new triple resonance correlation technique named THYCOS.
authors.affiliation: Department of Chemical Physics, Weizmann Institute of Science, Rehovot Israel 76100.
authors.forename: Alexey
authors.initials: A
authors.lastname: Potapov
authors.forename: Israel
authors.initials: I
authors.lastname: Pecht
authors.forename: Daniella
authors.initials: D
authors.lastname: Goldfarb
mesh_terms: D001204:Ascorbate Oxidase / Q000737:chemistry*; D001665:Binding Sites; D003300:Copper / Q000737:chemistry*; D004578:Electron Spin Resonance Spectroscopy; D006639:Histidine / Q000737:chemistry; D008024:Ligands
chemical_list: D008024:Ligands; D006639:Histidine; D003300:Copper; D001204:Ascorbate Oxidase