Investigation into chromophore excited-state coupling in allophycocyanin

Xiguang Zheng; Fuli Zhao; He Zhou Wang; Zhaolan Gao; Zhenxin Yu; Jinchang Zhu; Andong Xia; Lijin Jiang

doi:10.1117/12.182768

17 August 1994 Investigation into chromophore excited-state coupling in allophycocyanin

Xiguang Zheng, Fuli Zhao, He Zhou Wang, Zhaolan Gao, Zhenxin Yu, Jinchang Zhu, Andong Xia, Lijin Jiang

Proceedings Volume 2137, Time-Resolved Laser Spectroscopy in Biochemistry IV; (1994) https://doi.org/10.1117/12.182768
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

Abstract

Both theoretical and experimental studies are presented on chromophore excited-state coupling in linker-free allophycocyanin (APC), one of the antenna phycobiliproteins in algal photosynthesis. A three-site-coupling model has been introduced to describe the exciton interaction mechanism amoung the excited (beta) chromophore in APC, and the exciton energy splitting is estimated. Picosecond polarized fluorescence experiments both on monomeric and trimeric APC isolated from alga Spirulina platensis have been performed. The experimental results show that APC monomer and trimer exhibit remarkedly different spectropic characteristics, and satisfy the suggestion of strong excited- state coupling among chromophores in APC.

Citation Download Citation

Xiguang Zheng, Fuli Zhao, He Zhou Wang, Zhaolan Gao, Zhenxin Yu, Jinchang Zhu, Andong Xia, and Lijin Jiang "Investigation into chromophore excited-state coupling in allophycocyanin", Proc. SPIE 2137, Time-Resolved Laser Spectroscopy in Biochemistry IV, (17 August 1994); https://doi.org/10.1117/12.182768

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