Investigation of large intramolecular movement within metmyoglobin by Rayleigh scattering of Mössbauer radiation (RSMR).

This paper reports Rayleigh scattering experiments on metmyoglobin crystals and freeze dried myoglobin which was exposed to air with different parital pressure of water vapor. While dry myoglobin shows no fluctuations between conformational substates such "breathing modes" are rarely seen in water covered myoglobin. Larger amounts of water increase the average mean square displacements.

[Debye-Waller factor of Rayleigh scattering of Mössbauer radiation at substances with strong conformation motions].

A model was developed to describe conformational motion of macromolecules. A new formula was derived for the Debye-Waller factor in accordance with this model. The model proposes the existence of fluidlike motions of fragments within the volume of some A3.

[Study of chromophore dynamics by means of Rayleigh scattering of Mossbauer radiation].

The temperature dependence of rayleigh scattering of Mössbauer radiation was studied for two samples of the chromatophores with different relative humidity (P/Ps = 0.35 and 0.94).