J Integr Plant Biol. ›› 1990, Vol. 32 ›› Issue (11): -.

• Research Articles •    

Comparative Studies on the Spectral Characteristics and Components of Chlorophyll-Protein Complex CPa Band from Three Different Preparations

Xu Chun-hui, Wang Ke-bin, Zhao Fu-hong, Yang Dan-hui and Dai Yun-ling   

Abstract: The comparative studies on the spectral characteristics of the chlorophyll-protein complex CPa isolated separately from spinach chloroplast preparation, O2-evolving PSⅡ preparation and PSⅡ reaction center core complex showed that the CPa band isolated from the former two preparations contained not only Chl a but also small amount of Chl b. This is different from the general view that there is only Chl a but no Chl b in CPa band. Furthermore, the Chl b content in CPa from the chloroplast preparation was higher than that of O2-evolving PSII preparation. It was found that there was only one chlorophyll-protein complex band, i.e., CPa band in PSⅡ reaction center core complex. So it is considered that PSⅡ reaction center chlorophyll-protein complex must be included in CPa band; but at least in the chloroplast preparation and the O2-evolving PSII preparation, some other components were also contained in CPa.

Key words: CPa Chloroplast, O2-evolving PSⅡ preparation, O2-evolving PSⅡ reaction center core complex

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