Liu Mei, Liu Qifang, Zhang Xiankong, Li Shanghao(S. H. Ley). STUDIES ON CHLOROPHYLL-PROTEIN COMPLEXES ISOLATED FROM N2-FIXING BLUE-GREEN ALGA ANABAENA SP. 7120 AND THEIR SPECTRAL CHARACTER[J]. ACTA HYDROBIOLOGICA SINICA, 1985, 9(1): 1-8.
Citation: Liu Mei, Liu Qifang, Zhang Xiankong, Li Shanghao(S. H. Ley). STUDIES ON CHLOROPHYLL-PROTEIN COMPLEXES ISOLATED FROM N2-FIXING BLUE-GREEN ALGA ANABAENA SP. 7120 AND THEIR SPECTRAL CHARACTER[J]. ACTA HYDROBIOLOGICA SINICA, 1985, 9(1): 1-8.

STUDIES ON CHLOROPHYLL-PROTEIN COMPLEXES ISOLATED FROM N2-FIXING BLUE-GREEN ALGA ANABAENA SP. 7120 AND THEIR SPECTRAL CHARACTER

  • Received Date: April 22, 1983
  • Published Date: January 24, 1985
  • Seven bands have been isolated from photo-membranes of N2-fixing blue-green alga Anabaena sp. 7120 using membrane solubilization and SDS-polyacrylamide gel electrophoresis methods.Five chlorophyll-protein complex zones with lowest eleetrophoretic mobility show the same characteristics of absorbance spectra and room temperature fluorescence spectra. They have a red absorbance maximum at 676 nm and a blue absorbance maximum at 438 nm. They exhibit a fluorescence emission maximum at 672—673 nm under room temperature; there are also three small peaks at 710, 732 and 740 nm respectively. These are characteristics of CPI chlorophyll. Therefore, we consider these chlorophyll-protein complex zones belong to photosystem I. Another chlorophyll-protein complex zone with intermediate mobility is termed complex II (CP Ⅱ), with a red absorbance maximum at 672 nm and a blue absorbance maximum at 436 nm. Compared with CPI, both of the peaks shifted to shorter wavelength. It has a fluorescence emission maximum at 675 nm, and has not the smaller peaks characterizing of CPI. These properties show that this zone is different from CPI zones, and it is a complex associated with reaction center of photosystem Ⅱ.The zone of fastest mobility is free pigment.The fluorescence excitation spectra of CPI and CPⅡ at room temperature have been determined too.
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