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Photosynthesis in the higher plant Vicia faba [broadbeans]. V. Role of malate as a precursor of the tricarboxylic acid cycle

Kent, S.S

Plant physiology (Bethesda), 1979-07, Vol.64 (1), p.159-161 [Periódico revisado por pares]

United States: American Society of Plant Physiologists

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  • Título:
    Photosynthesis in the higher plant Vicia faba [broadbeans]. V. Role of malate as a precursor of the tricarboxylic acid cycle
  • Autor: Kent, S.S
  • Assuntos: Atoms ; Carbon isotopes ; Citrates ; Enzymes ; faba beans ; Glycolates ; Mitochondria ; Photosynthesis ; Plants ; Product labeling ; Tricarboxylic acid cycle
  • É parte de: Plant physiology (Bethesda), 1979-07, Vol.64 (1), p.159-161
  • Notas: F60
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    This work was supported by Grant PCM 7700487 from the National Science Foundation, by Grant 3041-G1 from the Petroleum Research Fund of the American Chemical Society, and by BYU Professional Development Fund 115-76-411.
  • Descrição: In the higher plant Vicia faba, anomalous labeling patterns in the organic acids and related amino acids of the tricarboxylic acid cycle which result from photosynthetic 14CO2 fixation (in conjunction with an enzyme localization pattern unique to plant mitochondria) suggest that the tricarboxylic acid cycle functions primarily as a pathway leading to glutamic acid biosynthesis during autotrophic growth. The distribution of isotope in citrate indicates little recycling of oxaloacetate for the resynthesis of citrate. Rather, malate appears to provide both the C2 and C4 fragments for the synthesis of citrate, and [3H]formate and 14CO2-labeling patterns implicate serine as the ultimate C3 precursor of malate.
  • Editor: United States: American Society of Plant Physiologists
  • Idioma: Inglês
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