Analysis of existing models of spin label movement during spin labeling of biological macromolecules [Analiz sushchestvuiushchikh modeleǐ dvizheniia spinovoǐ metki pri spin-mechenii biologicheskikh makromolekul.]

Analysis of existing models of spin label movement during spin labeling of biological macromolecules [Analiz sushchestvuiushchikh modeleǐ dvizheniia spinovoǐ metki pri spin-mechenii biologicheskikh makromolekul.]. Bondarev, G., Isaev-Ivanov, V., Isaeva-Ivanova, L., Kleǐner, A., & Krymov, V. Molekulyarnaya Biologiya, 21(6):1655-1663, 1987. cited By 1

Paper abstract bibtex

The spin-labeled bovine serum albumin and IgG were studied in search of an experimental approach for comparison of different models of rotational mobility of spin label. These models are: the model of isotropic motion of spin label together with the macromolecule (IM); the model of highly anisotropic motion of spin label (HAM); and the model of slow isotropic motion of label around the binding site (SIML). The experimental spectra were measured on a common X-band ESR spectrometer and on the unique 140 GHZ (lambda = 2 mm) ESR spectrometer under the same conditions. Theoretical spectra were computer-calculated according to Freed's theory. We have found, that the results of temperature-viscosity experiments in X-band are contradictory to the model of IM both for the BSA and IgG species. The models of HAM and SIML for the BSA give identical X-band spectra. The bovine serum albumin spectra in the 2 mm region strongly contradict to the assumptions of the HAM model. Also, the SIML model fails to describe the experimental spectra in terms of isotropic motion of the spin label around the binding site. X-band spectra of IgG can not be explained by the SIML model, while the same spectra in the 2 mm region can not be explained by the HAM model.

@ARTICLE{Bondarev19871655,
author={Bondarev, G.N. and Isaev-Ivanov, V.V. and Isaeva-Ivanova, L.S. and Kleǐner, A.R. and Krymov, V.N.},
title={Analysis of existing models of spin label movement during spin labeling of biological macromolecules [Analiz sushchestvuiushchikh modeleǐ dvizheniia spinovoǐ metki pri spin-mechenii biologicheskikh makromolekul.]},
journal={Molekulyarnaya Biologiya},
year={1987},
volume={21},
number={6},
pages={1655-1663},
note={cited By 1},
url={https://www.scopus.com/inward/record.uri?eid=2-s2.0-0023447664&partnerID=40&md5=4cc5a10ee8f0932ce376d05f1a1ae7a2},
abstract={The spin-labeled bovine serum albumin and IgG were studied in search of an experimental approach for comparison of different models of rotational mobility of spin label. These models are: the model of isotropic motion of spin label together with the macromolecule (IM); the model of highly anisotropic motion of spin label (HAM); and the model of slow isotropic motion of label around the binding site (SIML). The experimental spectra were measured on a common X-band ESR spectrometer and on the unique 140 GHZ (lambda = 2 mm) ESR spectrometer under the same conditions. Theoretical spectra were computer-calculated according to Freed's theory. We have found, that the results of temperature-viscosity experiments in X-band are contradictory to the model of IM both for the BSA and IgG species. The models of HAM and SIML for the BSA give identical X-band spectra. The bovine serum albumin spectra in the 2 mm region strongly contradict to the assumptions of the HAM model. Also, the SIML model fails to describe the experimental spectra in terms of isotropic motion of the spin label around the binding site. X-band spectra of IgG can not be explained by the SIML model, while the same spectra in the 2 mm region can not be explained by the HAM model.},
correspondence_address1={Bondarev, G.N.},
issn={00268984},
pubmed_id={2833690},
language={Russian},
abbrev_source_title={Mol Biol (Mosk)},
document_type={Article},
source={Scopus},
}

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