Quantitative EPR of an S= 7/2 system in thionine‐oxidized MoFe proteins of nitrogenase
- 1 December 1987
- journal article
- research article
- Published by Wiley in European Journal of Biochemistry
- Vol. 169 (3), 457-465
- https://doi.org/10.1111/j.1432-1033.1987.tb13633.x
Abstract
Thionine-oxidized nitrogenase MoFe proteins from Azotobacter vinelandii. Azotobacter chroococcum and Klebsiella pneumoniae exhibit excited-state EPR signals with g = 10.4, 5.8 and 5.5 with a maximal amplitude in the temperature range of 20-50 K. The magnitude of these effective g values, combined with the temperature dependence of the peak area at g = 10.4 from 12 K to 86 K, are consistent with an S = 7/2 system with spin Hamiltonian parameters D = -3.7 .+-. 0.7 cm-1,This publication has 34 references indexed in Scilit:
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