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Das Vorkommen von Malatenzym und Malo-Lactat-Enzym bei verschiedenen Milchsäurebakterien

The presence of malic enzyme and malo-lactic enzyme in various lactic acid bacteria

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Abstract

  1. 1.

    Malic enzyme was induced by malic acid and malo-lactic enzyme was induced by malic acid and glucose in cells of three strains ofLactobacillus casei that were able to grow on malate as carbon source. Two strains ofStreptococcus faecalis formed malic enzyme only, whereas only malo-lactic enzyme was formed by a glucose requiring strain ofStreptococcus lactis.

  2. 2.

    Given sequential induction, cells ofLactobacillus casei M40 were found to contain malic enzyme and malo-lactic enzyme simultaneously.

  3. 3.

    Malic enzyme and malo-lactic enzyme have been separated by chromatography on Sephadex G-200. These two enzymes have a different pH optimum, different affinities for substrates, form different end products from malate, and have molecular weights of 120000 and 150000 daltons respectively.

Zusammenfassung

  1. 1.

    Bei drei Stämmen vonLactobacillus casei, die auf Äpfelsäure als C-Quelle wuchsen, wurde durch Kultur mit Äpfelsäure entweder Malatenzym oder durch Kultur mit Äpfelsäure und Glucose Malo-Lactat-Enzym induziert. Zwei Stämme vonStreptococcus faecalis bildeten nur Malatenzym,Streptococcus lactis, der Glucose zum Wachstum braucht, nur Malo-Lactat-Enzym.

  2. 2.

    Durch aufeinanderfolgende Induktion wurden Zellen vonLactobacillus casei M40 mit Malatenzym und Malo-Lactat-Enzym erhalten.

  3. 3.

    Malatenzym und Malo-Lactat-Enzym unterscheiden sich im Induktionsverhalten, im pH-Optimum, in der Affinität zum Substrat, in den Endprodukten und im Molekulargewicht.

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Schütz, M., Radler, F. Das Vorkommen von Malatenzym und Malo-Lactat-Enzym bei verschiedenen Milchsäurebakterien. Arch. Microbiol. 96, 329–339 (1974). https://doi.org/10.1007/BF00590188

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