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Verwertung von Fructose durch Hydrogenomonas H 16

II. Cryptisches Verhalten gegenüber Glucose

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Zusammenfassung

Hydrogenomonas H 16 wächst gut auf Fructose, kann aber Glucose nicht verwerten. Die Fructoseoxydation wird durch Glucose auch in höheren Konzentrationen nicht beeinflußt. Die im zellfreien Extrakt vorhandene Hexokinase phosphoryliert Glucose, Fructose und Mannose. Durch “free space”-Versuche wird nachgewiesen, daß Glucose nicht in das Zellinnere transportiert wird. Hydrogenomonas H 16 verhält sich also cryptisch gegenüber Glucose.

Summary

The only carbohydrate utilized by Hydrogenomonas strain H 16 is fructose. The oxidation of fructose is not influenced by glucose even at high concentrations. Cell-free preparations contain hexokinase which phosphorylated glucose, fructose, and mannose. By means of free-space experiments, it has been demonstrated, that glucose does not enter the cell. Strain H 16 behaves therefore as a cryptic with respect to glucose.

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Gottschalk, G. Verwertung von Fructose durch Hydrogenomonas H 16. Archiv. Mikrobiol. 49, 96–102 (1964). https://doi.org/10.1007/BF00510544

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