title: Dependence on freezing of the geometry and redox potential of type 1 and type 2 copper sites of Japanese-lacquer-tree (Rhus vernicifera) laccase.
abstract: The room-temperature e.p.r. spectrum of the Japanese-lacquer-tree (Rhus vernicifera) laccase shows A parallel (the hyperfine splitting constant) and g parallel values of both the Type 1 and Type 2 Cu appreciably different from those measured at liquid-N2 temperature. The geometry of the sites, as inferred from the room-temperature e.p.r. parameters, is more consistent with their redox properties. A rough correlation is found between A parallel and g parallel values and redox potential of the blue copper in several enzymes.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D003300:Copper / Q000378:metabolism*; D004578:Electron Spin Resonance Spectroscopy; D005615:Freezing; D042845:Laccase; D010084:Oxidation-Reduction; D010088:Oxidoreductases / Q000378:metabolism*; D011487:Protein Conformation; D014197:Trees
chemical_list: D003300:Copper; D010088:Oxidoreductases; D042845:Laccase