The Orientation of the Electric Field Gradient Tensor in CO-Liganded Myoglobin
Open Access
- 1 August 1977
- journal article
- research article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung C
- Vol. 32 (7-8) , 507-512
- https://doi.org/10.1515/znc-1977-7-805
Abstract
The EFG-tensor at the position of the Fe-atom of CO-liganded sperm whale myoglobin has been investigated by nuclear γ-resonance absorption experiments on single crystals. In addition the tem perature dependence of the quadrupole splitting of the 14.4 keV level of the iron nucleus was measured. An unambiguous solution for the magnitude and the orientation of the field gradient tensor could only be obtained with the assumption that a C2-axis perpendicular to the haem plane is one principal axis of the electric field gradient tensor. Within this solution the electronic structure of the iron is described by a singlet ground state with ηz = 0.75 and the largest EFG component perpendicular to the haem plane.Keywords
This publication has 2 references indexed in Scilit:
- Mössbauer investigation of deoxymyoglobin in a high magnetic field. Orientation of the electric field gradient and magnetic tensorsBiochimica et Biophysica Acta (BBA) - Protein Structure, 1977
- Structure of horse carbonmonoxyhaemoglobinJournal of Molecular Biology, 1976