废水处理系统中活性污泥总DNA的提取
Total DNA extraction from activated sludge in a wastewater biotreatment system
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摘要: 对废水脱氮除磷厌氧-缺氧-好氧系统中的活性污泥样品经过或未经预处理,比较了超声波法、玻璃珠震荡法和冻融法3种细胞裂解方法对DNA提取效果的影响。吸光度和琼脂糖凝胶电泳检测结果表明:活性污泥经TENP和PBS预处理后采用冻融法加2%SDS裂解细胞的DNA提取操作,可以得到数量多、纯度高的活性污泥DNA样品,可不经纯化直接进行PCR扩增反应。Abstract: Effects of total DNA extraction from activated sludge with/without pretreatment were compared by three kinds of cell lysis methods, i.e. sonication irradiation, glass bead shaking and freezethawing process in an anaerobic-anoxic-aerobic denitrification-dephosphorization system. By detection of ultraviolet adsorption spectrum analysis and agarose gel electrophoresis, results showed that the DNA samples with high yield and purity were obtained by TENP and PBS pretreated, and 2%SDS and freeze-thawing lyzed, and PCR analysis was done directly without purification.
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Key words:
- DNA extraction /
- cell lysis /
- activated sludge
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