Plant and Cell Physiology Supplement
Abstract of the Annual Meeting of JSPP 2009
Conference information

Femtosecond Stimulated Emission Probing the Forbidden 1Bu- and 3Ag- Levels of Carotenoids and 25Mg-NMR Signal Probing the Axial Coordination / Interaction of Bacteriochlorophylls
*Rebecca ChristianaShiho AoyagiYoshinori KakitaniTakeshi MikiYasushi KoyamaToshihito NakaiHiroaki UtsumiTadashi Shimizu
Author information
CONFERENCE PROCEEDINGS FREE ACCESS

Pages 0402

Details
Abstract
We have found that coherent excitation, with approximate 30 fs pulses, of the optically-allowed 1Bu+(0) and the overlapped, optically-forbidden 1Bu-(2) or 3Ag-(1) levels of carotenoids (spheroidene or lycopene) generates stimulated emission from the 1Bu-(0) and 3Ag-(0) level [T. Miki, Y. Kakitani, Y. Koyama and H. Nagae, Chem. Phys. Lett. 457 (2008) 222 ]. Also, we have shown that the axial coordination to the Mg atom of bacteriochlorophyll, i.e., the penta-coordinated state, in the presence or absence of additional axial interaction, can be probed by the width of the 25Mg-NMR signal [Y. Kakitani, Y. Koyama, Y. Shimoikada, T. Nakai, H. Utsumi, T. Shimizu and H. Nagae, accepted by Biochemistry].
We are applying these techniques to determine the 1Bu-(0) and 3Ag-(0) levels of the above carotenoids, and the axial coordination / interaction of B800 and B850 bacteriochlorophyll a, when bound to the LH2 complexes from Rba. sphaeroides 2.4.1 and Rsp. molischianum.
Content from these authors
© 2009 by The Japanese Society of Plant Physiologists
Previous article Next article
feedback
Top