Residual polymerase activity-induced bias in terminal restriction fragment length polymorphism analysis

Authors


*E-mail franco.widmer@art.admin.ch; Tel. (+41) 44 377 7376; Fax (+41) 44 377 7201.

Summary

Residual activity of polymerase chain reaction DNA polymerases in restriction analyses strongly affected genetic profiling based on terminal restriction fragment length polymorphisms. Artificial fragment sizes produced as a result of 5′-overhang restriction site fill-in and addition of a terminal A may bias genetic profiling and genotyping of microbial communities. Efficient removal of polymerases retained original fragment sizes and significantly reduced this profiling bias in soil bacterial communities.

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