CHANGES IN LEVELS OF PYRIDINE NUCLEOTIDES IN CHLORELLA CELLS DURING THE COURSE OF PHOTOSYNTHESIS |
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Authors: | OH-HAMA TAMIKO; MIYACHI SHIGETOH |
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Institution: | Institute of Applied Microbiology, University of Tokyo, and Tokugawa Institute for Biological Research Tokyo |
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Abstract: | - Using intact cells of Chlorella, the effects of CO2 on thelevelsof oxidized and reduced forms of DPN and TPN in the lightandin the dark were investigated.
- It was found that the light-inducedchanges of the DPNH-levelwere not affected by the presenceor absence of CO2. On theother hand, the light-induced increaseof TPNH was suppressedin the presence of CO2 and the levelof TPNH which was raisedon illumination in the absence of CO2was lowered by the provisionof CO2.
- On the basis of thesefindings, it was concluded that TPNH,but not DPNH, is participating,in some way, in the mechanismof photosynthesis.
- Discussionswere made on the difference in the sites of participationofTPNH and of the photogenic reducing agent (R) in the pathofcarbon in photosynthesis.
(Received February 28, 1960; ) |
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