The Bleaching of the Bacteriorhodopsin Chromophore by Ionizing Radiation

The Bleaching of the Bacteriorhodopsin Chromophore by Ionizing Radiation

Summary The visible chromophore of bacteriorhodopsin, BR(570), undergoes progressive bleaching when subjected to 60Co γ-irradiation. The low G-value for bleaching confirms that the site of the chromophore is highly protected. Positive and negative circular dichroic (CD) bands associated with the chr...

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Veröffentlicht in:International journal of radiation biology 1979-01, Vol.36 (1), p.11-17
Hauptverfasser: Sherman, W.V., Slifkin, M.A., Kushelevsky, A.P., Parker, S.A.H.
Format: Artikel
Sprache:eng
Schlagworte:
Bacteriorhodopsins - radiation effects
Carotenoids - radiation effects
Circular Dichroism
Cobalt Radioisotopes
Gamma Rays
Halobacterium - radiation effects
Monte Carlo Method
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Zusammenfassung:Summary The visible chromophore of bacteriorhodopsin, BR(570), undergoes progressive bleaching when subjected to 60Co γ-irradiation. The low G-value for bleaching confirms that the site of the chromophore is highly protected. Positive and negative circular dichroic (CD) bands associated with the chromophone undergo concomitant decrease in a manner which is consistent with two independent chromophores rather than exciton coupling between neighbouring chromophoric sites.
ISSN:0955-3002
0020-7616
1362-3095
DOI:10.1080/09553007914550771