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Biology
DNA的稳定同位素探测(DNA的SIP)
DNA的稳定同位素探测(DNA的SIP)
JoVE Journal
Biology
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JoVE Journal Biology
DNA Stable-Isotope Probing (DNA-SIP)

DNA的稳定同位素探测(DNA的SIP)

Full Text
45,236 Views
14:57 min
August 2, 2010

DOI: 10.3791/2027-v

Eric A. Dunford1, Josh D. Neufeld1

1Department of Biology,University of Waterloo

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Please note that some of the translations on this page are AI generated. Click here for the English version.

DNA的稳定同位素探测,识别和特性的微生物能够利用特定的基板活跃的社区是一个独立的种植方法。基板同化富集重同位素的信息纳入到微生物生物量的标记原子。密度梯度超速离心检索下游分子生物学分析的DNA标记。

该程序的总体目标是从消耗了目标生长底物的活性微生物中检索 DNA,而无需实验室培养。这是通过首先在与天然环境中发现的相似条件下将环境样品与目标稳定同位素标记的底物孵育来实现的。该程序的第二步是从该同位素标记的样品中提取总 DNA。

该程序的第三步是在氯化铯中对该 DNA 进行密度梯度超速离心。该程序的最后一步是分馏密度梯度,以获得重 DNA 和轻 DNA,用于随后的分子表征。最终,可以通过各种可能的分子技术(包括指纹图谱、微阵列、杂交、克隆、文库分析和宏基因组学)获得结果,揭示参与特定底物代谢的活性但未培养的微生物的身份。

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