Nag D K, Petes T D
Department of Biology, University of North Carolina, Chapel Hill 27599-3280.
Genetics. 1990 Aug;125(4):753-61. doi: 10.1093/genetics/125.4.753.
During meiotic recombination in the yeast Saccharomyces cerevisiae, heteroduplexes are formed as an intermediate in the exchange process. In the formation of an asymmetric heteroduplex, one chromosome acts as a donor of a single DNA strand and the other acts as a recipient. We present genetic evidence that the nontranscribed strand is donated more frequently than the transcribed strand in spores that have an unrepaired mismatch at the HIS4 locus.
在酿酒酵母的减数分裂重组过程中,异源双链体作为交换过程中的中间体形成。在不对称异源双链体的形成中,一条染色体作为单链DNA的供体,另一条作为受体。我们提供了遗传学证据,即在HIS4位点存在未修复错配的孢子中,非转录链比转录链更频繁地被捐赠。