Fine structure of iron ion in deoxyhemoglobin and deoxymyoglobin
- 1 September 1972
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Magnetics
- Vol. 8 (3) , 413-415
- https://doi.org/10.1109/tmag.1972.1067324
Abstract
To study the mechanism of oxygen binding of hemoglobin and myoglobin the electronic state of the central Fe2+ion was determined by means of magnetic susceptibility measurements. The paramagnetic saturation under high magnetic field of a superconducting magnet and the torque of a single crystal of hemoglobin were also studied. It was found that the fine structure of the lowest ground-state energy level (5B2) of ferrous ion in hemoglobin and myoglobin could be well represented by the spin Hamiltonian . The value of determined from the susceptibility measurements and from the field dependence of magnetization was 5 cm-1. From the torque measurements, the values of and were also estimated to be 5.3 and 0.9 cm-1, respectively.Keywords
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