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The induction of valine dehydrogenase activity from Streptomyces by L-valine is not repressed by ammonium

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Summary

Activity of valine dehydrogenases (VDH) from Streptomyces aureofaciens and S. fradiae is strongly induced by L-valine even in the presence of 25mM NH4 +. When added into 16 h-old cultures growing with 100mM NH4 +, L-valine induced the synthesis of VDH. The results indicate that Streptomyces can utilize L-valine in the presence of NH4 +, and the induction of VDH activity by L-valine is not repressed by NH4 +.

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Authors and Affiliations

  1. Institute of Microbiology, Academy of Sciences of the Czech Republic, Vídeňská 1083, 142 20, Prague 4, Czech Republic

    Kien Trung Nguyen, Lieu Thi Nguyen & Vladislav Běhal

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  1. Kien Trung Nguyen
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  2. Lieu Thi Nguyen
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  3. Vladislav Běhal
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Nguyen, K.T., Nguyen, L.T. & Běhal, V. The induction of valine dehydrogenase activity from Streptomyces by L-valine is not repressed by ammonium. Biotechnol Lett 17, 31–34 (1995). https://doi.org/10.1007/BF00134191

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