TY - JOUR
T1 - Evidence for temperature dependent anisotropic diffusive motion of heme iron in crystals of myoglobin through Mossbauer spectroscopy
AU - Bauminger, E. R.
AU - Cohen, S. G.
AU - Nowik, I.
AU - Ofer, S.
AU - Yariv, J.
PY - 1983/12
Y1 - 1983/12
N2 - A careful investigation of Mössbauer absorption of57Fe in an assembly of unaligned crystals of deoxymyoglobin has revealed asynimetric shapes of the spectra in the range of temperatures between -25C and 25C, which includes the physiological significant temperatures. The asymmetry increases with temperature. The spectral shapes, displaying wide wings, show the presence of modes of collective diffusive motion in which the Fe atoms participate. The results are interpreted in terms of temperature-dependent anisotropic dynamics of the slow collective diffusive modes, based on a model of bounded diffusion assuming absorption in an anisotropic harmonic oscillator in Brownian motion. For example, assuming eqQ > 0, and axial symmetry, we obtain at 20C,[Figure not available: see fulltext.]=0.040Å2 and 12> = 0.016Å2.
AB - A careful investigation of Mössbauer absorption of57Fe in an assembly of unaligned crystals of deoxymyoglobin has revealed asynimetric shapes of the spectra in the range of temperatures between -25C and 25C, which includes the physiological significant temperatures. The asymmetry increases with temperature. The spectral shapes, displaying wide wings, show the presence of modes of collective diffusive motion in which the Fe atoms participate. The results are interpreted in terms of temperature-dependent anisotropic dynamics of the slow collective diffusive modes, based on a model of bounded diffusion assuming absorption in an anisotropic harmonic oscillator in Brownian motion. For example, assuming eqQ > 0, and axial symmetry, we obtain at 20C,[Figure not available: see fulltext.]=0.040Å2 and 12> = 0.016Å2.
UR - http://www.scopus.com/inward/record.url?scp=34250154794&partnerID=8YFLogxK
U2 - 10.1007/BF02147385
DO - 10.1007/BF02147385
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AN - SCOPUS:34250154794
SN - 0304-3834
VL - 16
SP - 881
EP - 884
JO - Hyperfine Interactions
JF - Hyperfine Interactions
IS - 1-4
ER -