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Selection aid properties of hyperproducing D-serine deaminase mutants ofEscherichia coli

✍ Scribed by E. Pavlasová; E. Stejskalová; B. Sikyta

Publisher
Springer Netherlands
Year
1980
Tongue
English
Weight
351 KB
Volume
2
Category
Article
ISSN
0141-5492

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✦ Synopsis

Hyperproducing constitutive D-serine deaminase mutant E,coli were selected by a chemostat method. The specific activity of the enzyme in these mutants is 25fold higher in comparison with the fully induced parental strain.

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Selection of constitutive tryptophanase
Selection of constitutive tryptophanase hyperproducing mutants ofEscherichia coli
✍ E. Pavlasová; E. Stejskalová; B. Sikyta 📂 Article 📅 1983 🏛 Springer Netherlands 🌐 English ⚖ 358 KB

Constitutive tryptophanase hyperproducing mutants of Escherichia coli were isolated. The specific enzyme activities of these mutants are 3-5 times higher than those of the fully induced wild-type strain and the enzyme synthesis is more resistant to catabolite repression.