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Proceedings Paper

Investigation into chromophore excited-state coupling in allophycocyanin
Author(s): Xiguang Zheng; Fuli Zhao; He Zhou Wang; Zhaolan Gao; Zhenxin Yu; Jinchang Zhu; Andong Xia; Lijin Jiang
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Paper 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.

Paper Details

Date Published: 17 August 1994
PDF: 11 pages
Proc. SPIE 2137, Time-Resolved Laser Spectroscopy in Biochemistry IV, (17 August 1994); doi: 10.1117/12.182768
Show Author Affiliations
Xiguang Zheng, Zhongshan Univ. (China)
Fuli Zhao, Zhongshan Univ. (China)
He Zhou Wang, Zhongshan Univ. (China)
Zhaolan Gao, Zhongshan Univ. (China)
Zhenxin Yu, Zhongshan Univ. (China)
Jinchang Zhu, Institute of Photographic Chemistry (China)
Andong Xia, Institute of Photographic Chemistry (China)
Lijin Jiang, Institute of Photographic Chemistry (China)


Published in SPIE Proceedings Vol. 2137:
Time-Resolved Laser Spectroscopy in Biochemistry IV
Joseph R. Lakowicz, Editor(s)

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