中国激光, 1998, 25 (4): 318, 网络出版: 2006-10-18
四种别藻蓝蛋白三聚体的时间分辨荧光光谱研究
Study on the Time resolved Fluorescence Spectroscopy of Four Kinds of Allophycocyanin Trimers
别藻蓝蛋白 瞬态荧光光谱 衰减寿命 吸收光谱 偶极-偶极相互作用 PBS (phycobilisome) APC (Allophycocyanin) transient fluorescence life time absorption spectroscopy dipole dipole interaction
摘要
研究了从Anabanavaribilis中提取的4种别藻蓝蛋白APCⅠ,APCⅡ,APCⅡ及APCB三聚体的稳态光谱和皮秒荧光光谱。采用Monte-Carlo方法对瞬态荧光光谱进行拟合,实验结果表明:APCⅠ荧光有两个带,其中第一个带位于662 nm,有两个时间组分:35.8 ps和1.67 ns;第二个带位于680 nm,有两个时间组分:34.2 ps和1.64 ns;APCII瞬态荧光位于660 nm,有两个时间组分:20.4 ps和1.64 ns;APCII瞬态荧光位于660 nm,有两个时间组分:23.8 ps和1.76 ns;APCB瞬态荧光有两个带,其中第一个带位于662 nm,有两个时间组分:36.6 ps和1.45 ns;第二个带位于680 nm,有两个时间组分:25.8 ps和1.62 ns。实验结果一方面说明了藻胆体核内4种别藻蓝蛋白形成能量传递的两条途径;另一方面瞬态荧光解叠结果揭示了APCⅠ和APCB三聚体内能量传递的超快过程。
Abstract
The time resolved fluorescence spectra and steady state spectra of four kinds of APCs have been studied. The data have been analyzed in terms of a sum of exponensials by Monte Carlo method. The results show that two bands appear in API and APB fluorescence spectra at 662 nm and 680 nm with different lifetimes (662 nm APC I: 35.8 ps, 1.67 ns; APB: 36.6 ps, 1.45 ns; 680 nm APC Ⅰ: 34.2 ps, 1.64 ns, and APB: 25.8 ps, 1.62 ns); while for APC Ⅱ and APC Ⅲ, only one peak exists at 660 nm with different lifetimes (APCⅡ:20.4 ps, 1.64 ns; APCⅢ :23.8 ps,1.76 ns). The results indicate that there are two paths of energy transfer in core of PBS and imply the ultrafast energy transfer processes of the APCI and APCB trimers.
赵福利, 郑锡光, 汪河洲, 余振新, 高兆兰, 王慧, 赵井泉, 蒋丽金. 四种别藻蓝蛋白三聚体的时间分辨荧光光谱研究[J]. 中国激光, 1998, 25(4): 318. 赵福利, 郑锡光, 汪河洲, 余振新, 高兆兰, 王慧, 赵井泉, 蒋丽金. Study on the Time resolved Fluorescence Spectroscopy of Four Kinds of Allophycocyanin Trimers[J]. Chinese Journal of Lasers, 1998, 25(4): 318.