These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: The orientations of transition moments in reaction centers of Rhodopseudomonas sphaeroides, computed from data of linear dichroism and photoselection measurements.
    Author: Clayton RK, Rafferty CN, Vermeglio A.
    Journal: Biochim Biophys Acta; 1979 Jan 11; 545(1):58-68. PubMed ID: 310319.
    Abstract:
    Linear dichroism measurements of reaction centers of Rhodopseudomonas sphaeroides in stretched gelatin films have yielded angles that various optical transition moments make with an axis of symmetry in the reaction center. Photoselection experiments have yielded angles that certain transition moments make with each other. We have combined these data so as to compute the orientations of the Qx and Qy transition moments of the two molecules of bacteriopheophytin and of the bacteriochlorophyll special pair (photochemical electron donor) in the reaction center. Orientations are expressed in spherical polar coordinates with the symmetry axis as the pole. We have also computed additional angles between pairs of transition moments. In this treatment we have assumed that the bacteriopheophytins are independent monomers with little or no exciton coupling.
    [Abstract] [Full Text] [Related] [New Search]