Revised Assignment of Energy Storage in the Primary Photochemical Event in Bacteriorhodopsin

Author(s)

Robert R. Birge, Syracuse University
Thomas M. Cooper, Syracuse University
Albert F. Lawrence, Syracuse University
Mark Masthay, University of DaytonFollow
Chian-Fan Zhang, Syracuse University
Raphael Zidovetzki, Syracuse University

Document Type

Article

Publication Date

5-1991

Publication Source

Journal of the American Chemical Society

Abstract

Bactcriorhodopsin is the light-transducing protein in the purple membrane of Halobacterium halobium. Irradiation of the light-adapted form (bR) initiates a photocycle that pumps protons across the membrane. An accurate assignment of the energy storage associated with the primary event of bR is important to an understanding of the molecular mechanism and the stoichiometry of proton pumping. Previous photocalorimetric studies have concluded that ~16 kcal mol^-1 is stored in the K photoproduct, an energy sufficient to pump two protons per photocycle.

Inclusive pages

4327-4328

ISBN/ISSN

0002-7863

Comments

Permission documentation on file.

Copyright

Copyright © 1991, American Chemical Society

Publisher

American Chemical Society

Volume

113

Peer Reviewed

yes

Issue

11

eCommons Citation

Birge, Robert R.; Cooper, Thomas M.; Lawrence, Albert F.; Masthay, Mark; Zhang, Chian-Fan; and Zidovetzki, Raphael, "Revised Assignment of Energy Storage in the Primary Photochemical Event in Bacteriorhodopsin" (1991). Chemistry Faculty Publications. 76.
https://ecommons.udayton.edu/chm_fac_pub/76