Heude M, Fukuhara H, Moustacchi E
J Bacteriol. 1979 Aug;139(2):460-7. doi: 10.1128/jb.139.2.460-467.1979.
The deletion which leads to spontaneous rho mutants occurs preferentially at a unique region covering genes oxi3, pho1/OII, and mit175. The frequency of loss of genetic markers in this region was significantly higher than in other regions as determined with a 15- marker system. When various mutagenic treatments were applied, this specific pattern of deletion was also observed, but it was dramatically amplified. This suggests that the basic mechanism of rho production is the same in yeast mitochondrial genomes in both spontaneous and induced mutants.
导致自发rho突变体的缺失优先发生在一个覆盖oxi3、pho1/OII和mit175基因的独特区域。用一个15标记系统测定,该区域遗传标记的丢失频率显著高于其他区域。当应用各种诱变处理时,也观察到这种特定的缺失模式,但它被显著放大。这表明在酵母线粒体基因组中,自发突变体和诱导突变体产生rho的基本机制是相同的。