Multifrequency EPR, ENDOR, ELDOR and Mossbauer spectroscopic and high pressure cryogenic techniques are employed in combination with advanced numerical analytic methods to study the components and interactions of a variety of redox proteins, and in the process determine structural parameters of the active sites and elucidate protein mechanisms. During these studies, very strong emphasis is placed on spectral fitting techniques to computer simulate the output of the EPR and Mossbauer spectrometers in terms of physical models. The systems under study include: lipoxygenase from soybeans and green cotyledons (tissue culture), the hydrogenase from D. vulgaris and M. elsdenii, the cytochrome c3 from D. vulgaris, several bacterial 2-, 4- and 8- iron ferredoxins, the High Potential Iron Protein from C. vinosum, alloxazine and isoalloxazine free radicals and the nitrogenase from Azotobacter vinelandii.

Agency
National Institute of Health (NIH)
Institute
National Institute of General Medical Sciences (NIGMS)
Type
Research Project (R01)
Project #
2R01GM032785-04
Application #
3281916
Study Section
Biophysics and Biophysical Chemistry B Study Section (BBCB)
Project Start
1983-12-01
Project End
1991-11-30
Budget Start
1986-12-01
Budget End
1987-11-30
Support Year
4
Fiscal Year
1987
Total Cost
Indirect Cost
Name
University of Michigan Ann Arbor
Department
Type
Organized Research Units
DUNS #
791277940
City
Ann Arbor
State
MI
Country
United States
Zip Code
48109
Drake, D H; McClanahan, T B; Ning, X H et al. (1987) Changes in contractility fail to alter the size of the functional border zone in anesthetized dogs. Circ Res 61:166-80
Gallagher, K P; Ning, X H; Gerren, R A et al. (1987) Effect of aortic constriction on the functional border zone. Am J Physiol 252:H826-35