title: Electron--nuclear-double-resonance studies of spinach plastocyanin.
abstract: Electron--nuclear-double-resonance (ENDOR) studies of spinach plastocyanin revealed that 14N-hyperfine couplings from its two co-ordinated imidazole groups are characteristically small in anisotropy and relatively high in ENDOR frequencies and that the two imidazole groups are magnetically equivalent. The relatively strong copper-imidazole co-ordinate bonds of plastocyanin are interpreted to be a result of the coexistence of a strong copper--thiol co-ordinate bond.
mesh_terms: D001665:Binding Sites; D003300:Copper / Q000032:analysis; D007093:Imidazoles / Q000032:analysis; D010940:Plant Proteins; D010944:Plants / Q000032:analysis*; D010970:Plastocyanin; D013053:Spectrophotometry
chemical_list: D007093:Imidazoles; D010940:Plant Proteins; D003300:Copper; C029899:imidazole; D010970:Plastocyanin