Identification of RNase-resistant RNAs in Saccharomyces cerevisiae extracts: Separation from chromosomal DNA by selective precipitation.
Identification of RNase-resistant RNAs in Saccharomyces cerevisiae extracts: Separation from chromosomal DNA by selective precipitation.
复制标题
酿酒酵母提取物中 RNase 抗性 RNA 的鉴定:通过选择性沉淀从染色体 DNA 中分离。
DOI:
10.1016/j.ab.2015.09.017
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发表时间:
2016
影响因子:
2.9
通讯作者:
Maeder,Corina
中科院分区:
文献类型:
--
作者:
Rodriguez,BlancaV;Malczewskyj,EricT;Cabiya,JoshuaM;Lewis,LKevin;Maeder,Corina
High-quality chromosomal DNA is a requirement for many biochemical and molecular biological techniques. To isolate cellular DNA, standard protocols typically lyse cells and separate nucleic acids from other biological molecules using a combination of chemical and physical methods. After a standard chemical-based protocol to isolate chromosomal DNA fromSaccharomyces cerevisiaeand then treatment with RNase A to degrade RNA, two RNase-resistant bands persisted when analyzed using gel electrophoresis. Interestingly, such resistant bands did not appear in preparations ofEscherichia colibacterial DNA after RNase treatment. Several enzymatic, chemical, and physical methods were employed in an effort to remove the resistant RNAs, including use of multiple RNases and alcohol precipitation, base hydrolysis, and chromatographic methods. These experiments resulted in the development of a new method for isolation ofS. cerevisiaechromosomal DNA. This method utilizes selective precipitation of DNA in the presence of a potassium acetate/isopropanol mixture and produces high yields of chromosomal DNA without detectable contaminating RNAs.
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