Abstract
ABSTRACTWe developed a method for isolation of DNA of cellulolytic microbies from soil, so that DNA sample was free from soil organic matter (SOM). The method consists of three procedures: propagation of cellulolytic microbes, separation of microbial cells from SOM, and DNA extraction using cetyl trimethyl-ammonium bromide (CTAB). Differential centrifugation with Ficoll-PM400 successfully separated the cells from soil particles and SOM. From 1 g of soil, 0.12-0.51 μg of microbial DNA with an average size of 15-20 kbp was isolated. Denaturing Gradient Gel Electrophoresis showed that DNA from a variety of cellulolytic microbes was recovered.
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