Electron-nuclear-double-resonance studies of spinach plastocyanin

1 October 1983

journal article
research article
Published by Portland Press Ltd. in Biochemical Journal

Vol. 215 (1) , 209-212
https://doi.org/10.1042/bj2150209

Abstract

Electron-nuclear-double-resonance (ENDOR) studies of spinach plastocyanin revealed that 14N-hyperfine couplings from its 2 co-ordinated imidazole groups are characteristically small in anisotropy and relatively high in ENDOR frequencies and that the 2 imidazole groups are magnetically equivalent. The relatively strong Cu-imidazole co-ordinate bonds of plastocyanin are a result of the coexistence of a strong Cu-thiol co-ordinate bond.

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