Excision of pyrimidine dimers by several UV-sensitive mutants of S. pombe

✍ Scribed by Birnboim, H. C. ;Nasim, A.

• Publisher: Springer
• Year: 1975
• Tongue: English
• Weight: 419 KB
• Volume: 136
• Category: Article
• ISSN: 0026-8925
• DOI: 10.1007/bf00275444

✦ Synopsis

Nine radiation-sensitive mutants of S. pombe showing a variety of phenotypic characteristics were analysed for their ability to excise pyrimidine dimers after ultraviolet irradiation. From earlier studies using indirect parameters, it was expected that some would be excision-deficient. Data reported here show that all the mutants tested, like wild type cells, were able to remove a high percentage of pyrimidine dimers during post-irradiation incubation in several different holding media, but not in saline or phosphate buffer. These mutants included strains showing increased, as well as others which showed decreased, levels of UV-induced mutation frequency relative to that of the wild type at the same total dose.