Nitrogenase genes in PCR and RT-PCR reagents: implications for studies of diversity of functional genes.

Abstract excerpt

Studies of the diversity of microorganisms in the environment have been facilitated by use of PCR and reverse transcription PCR (RT-PCR). Inhibition of the PCR by complex sample matrices and low abundance of some target microorganisms require the use of high-sensitivity amplification procedures, involving a large number of cycles or nested PCR methods. Using these methods, we frequently observed contamination of...

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