Nitrosyl hemoglobin: EPR components at low temperatures
- 1 March 1992
- journal article
- research article
- Published by Springer Nature in European Biophysics Journal
- Vol. 21 (1) , 57-61
- https://doi.org/10.1007/bf00195444
Abstract
The EPR spectrum of nitrosyl hemoglobin has been studied from 7.5 K to 104 K. It is composed of at least three components (A, B and C) which have a different dependence on temperature and power level. The A component decreases with increasing temperature. The B component disappears at around 30 K and is replaced by C. Relaxation of A follows the Orbach mechanism with an energy of 28 cm−1. This behavior can be attributed to phonon induced changes in the orientation of NO with respect to the heme plane.Keywords
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