An improved method for preparing nucleic acid extracts from environmental samples contaminated by polymerase inhibitors such as humic and fulvic acids is provided. The methods of the invention utilize chemical compositions capable of precipitating humic and/or fulvic acids from organic samples. The methods may be used in connection with the preparation of DNA and RNA extracts, thereby providing purified preparations suitable for amplification using PCR, RT-PCR, and other nucleic acid amplification technologies. Reagent kits for preparing a purified nucleic acid-containing extract from an environmental sample of soil, fluid, or organic particles, using the chemical compositions of the invention are also provided.
提供了一种改进的方法,用于从受聚合酶
抑制剂(例如
腐殖酸和
富里酸)污染的环境样品中制备核酸
提取物。本发明的方法利用能够从有机样品中沉淀
腐殖酸和/或
富里酸的
化学组合物。该方法可用于DNA和RNA提取的准备,从而提供适用于PCR、RT-PCR和其他核酸扩增技术的纯化制剂。本发明还提供了用于使用本发明的
化学组合物从土壤、流体或有机颗粒的环境样品中制备含有纯化核酸的
提取物的试剂盒。