Author/Authors :
Coremans، نويسنده , , J.W.A. and van Gastel، نويسنده , , M. and Poluektov، نويسنده , , O.G. and Groenen، نويسنده , , E.J.J. and den Blaauwen، نويسنده , , T. and van Pouderoyen، نويسنده , , G. and Canters، نويسنده , , G.W. and Nar، نويسنده , , H. and Hammann، نويسنده , , C. and Messerschmidt، نويسنده , , A.، نويسنده ,
Abstract :
We report electron-nuclear double-resonance experiments on a single crystal of azurin at 95 GHz and electron-spin-echo envelope-modulation experiments on frozen solutions of azurin and of the H117G mutant at 9 GHz. The hyperfine and quadrupole tensors of the two remote nitrogens of the histidine ligands of copper are assigned and discussed. A third nucleus is found to contribute to the echo-modulation spectrum and this probably concerns an amide nitrogen of the peptide backbone.
