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  • 1
    Electronic Resource
    Electronic Resource
    Paramylon synthesis by Euglena gracilis photoheterotrophically grown under low O2 pressure (1981)
    Springer
    Planta 153 (1981), S. 6-13 
    Details
    ISSN: 1432-2048
    Keywords: Aerophily (micro-) ; Chloroplasts ; Euglena ; Mitochondria ; Paramylon synthesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Special culture conditions for Euglena gracilis Z and ZR are described. They induce interactions between the chloroplast and mitochondrial metabolisms leading to paramylon synthesis. When grown in continuous light under pure nitrogen and in the presence of lactate as the sole carbon source, sugar synthesis occurs during the first 24 h of culture with the participation of both mitochondria (using lactate) and of chloroplasts (fixing CO2 from lactate decarboxylation). The activities of ribulose bisphosphate carboxylase, phosphoenolpyruvate carboxylase, and phosphoenolpyruvate carboxykinase are very high and mitochondria and chloroplasts develop then a common network of vesicles in which paramylon grains can be seen. Electron micrographs demonstrate membrane continuity between the two types of organelles. Occasionally the mitochondrial matrix and the chloroplast stroma are separated by only a unit membrane.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00385311
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  • 2
    Electronic Resource
    Electronic Resource
    The Physiological Significance of Mitochondrial Proton Leak in Animal Cells and Tissues (1997)
    Springer
    Bioscience reports 17 (1997), S. 9-16 
    Details
    ISSN: 1573-4935
    Keywords: Mitochondria ; proton leak ; Standard Metabolic Rate ; thermogenesis ; metabolic sensitivity ; reactive oxygen species ; carbon flux control
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Mitochondrial proton leak is an important component of cellular metabolism in animals and may account for as much as one quarter to one third of the Standard Metabolic Rate of the rat. The activity of the proton leak pathway is different in a wide range of animal species and in different thyroid states. Such differences imply some function for proton leak and candidates for this function include thermogenesis, protection against reactive oxygen species, endowment of metabolic sensitivity and maintenance of carbon fluxes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1027327015957
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