Elastic control of electron transfer enthalpy and intensity of light absorption by cupric blue proteins.
The experimental data available shows that the change in enthalpy accompanying electron transfer to cupric blue proteins decreases as the ratio of the strengths of two visible light absorption bands increases. A compact mathematical expression for this inverse relation is formulated, the derivation of which demonstrates that the unusual geometry imposed by the protein upon the redox site is responsible both for the optical band intensity ratio and for a significant fraction of the enthalpy change.
Brill
A S
AS
Department of Physics and Biophysics Program, University of Virginia, Charlottesville, VA 22901, USA. asbox@virginia.edu