Mutation frequency decline for streptomycin - resistant mutations induced by ultraviolet light in Escherichia coli B/r
โ Scribed by Colin H. Clarke; Ruth F. Hill
- Book ID
- 116036424
- Publisher
- Elsevier Science
- Year
- 1972
- Tongue
- English
- Weight
- 191 KB
- Volume
- 14
- Category
- Article
- ISSN
- 0027-5107
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It was shown previously that a major class of UV-resistant derivatives of lexA- strains of E. coli K-12 is defective in cell division at 42.5 degrees. The thermosensitive mutations, judging by genetic mapping and complementation tests, are believed to be intragenic suppressor mutations that lower th
The number of induced mutations to streptomycin resistance is compared at doses of ultraviolet (UV) light between 0.2 and 6.4 J/m2 in a Uvr- (excision-deficient) derivative of E. coli B/r, strain WU, and in its lambda lysogen, strain WU(lambda). At UV doses up to about 1 J/m2, which converts about 5