Abstract Model experiments demonstrating some possibilities of the primitive bioenergetics were performed. Comparing the catalytic properties of heme and hemoproteinoid in electron transfer reactions, it was shown that hemin acts as an active dark catalyst, whereas hemoproteinoid is a photosensitizer of these processes. The heme-containing enzyme, peroxidase/or even the hemoproteinoid/is also able to provide the phosphorylation of different substrates. It is proposed, that the phosphorylation is initiated by a hydroxyl radical occuring in the peroxidase reaction. We believe that those reactions could play a role in prebiotic energetics by coupling the electron transfer with the phosphorylation of suitable substrates.


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    Title :

    Some aspects of the origin and early evolution of bioenergetic processes


    Contributors:

    Published in:

    Origins of life ; 14 , 1-4 ; 315-322


    Publication date :

    1984




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English



    Classification :

    BKL:    44.71 Verkehrsmedizin
    Local classification TIB:    535/3908/4290



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