The sequences of a collection of 261 spontaneous lacI- mutants recovered in a PolA- strain of Escherichia coli have indicated an increase in the frequency of most classes of mutation in this strain. Among base substitutions in lacI, a preference for transversions over transitions was observed. In ad
Reiterated DNA sequences in a mutant strain of Streptomyces glaucescens and cloning of the sequence in Escherichia coli
✍ Scribed by Ono, Hideo ;Hintermann, Gilberto ;Crameri, Reto ;Wallis, Gillian ;Hütter, Ralf
- Publisher
- Springer
- Year
- 1982
- Tongue
- English
- Weight
- 581 KB
- Volume
- 186
- Category
- Article
- ISSN
- 0026-8925
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✦ Synopsis
Streptomyces glaucescens exhibits a high degree of genetic instability. A sequence of 7.2 kb has been found which is present in a few tandemly repeated copies in the wild type strain GLA 0 and is amplified to ca. 500 copies per genome in the mutant strain GLA 1204. This sequence was cloned in Escherichia coli using pBR325 as vector.
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