Abstract We found that molecular oxygen and aromatic amino acids such as tryptophan, tyrosine and phenylalanine were essential for the formation of marigranules. Among aromatic amino acids, tryptophan gave the best yield of marigranules. Among indole derivatives, kynurenine gave the best yield of marigranules. Large marigranules (0.3–3 μm in diameter) were formed from tryptophan in the presence of $ Ca^{2+} $ and $ Mg^{2+} $, and small marigranules (0.2–0.6 μm in diameter) were produced in the absence of such divalent metal ions. Marigranules formed from tryptophan were partially solubilized with methanol and completely solubilized with dimethyl sulfoxide and dimethyl-formamide. The solubilized marigranules consisted of polymers with molecular weights of 2×$ 10^{3} $ and $ 10^{5} $–$ 10^{7} $ daltons. The methanol-soluble fraction provided well-defined vesicles upon sonication. Marigranule-like particles were formed from D,L-glyceraldehyde, D-erythrose and D-ribose but they were not formed from glycolaldehyde, L-arabinose and D-glucose. Among sugars, D-erythrose gave the best yield of the particles.


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    Titel :

    Formation and characterization of marigranules from tryptophan and sugars


    Beteiligte:
    Yanagawa, Hiroshi (Autor:in) / Ogawa, Yoko (Autor:in)

    Erschienen in:

    Origins of life ; 14 , 1-4 ; 359-364


    Erscheinungsdatum :

    1984




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch



    Klassifikation :

    BKL:    44.71 Verkehrsmedizin
    Lokalklassifikation TIB:    535/3908/4290