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Applied and Environmental Microbiology, March 2008, p. 1660-1663, Vol. 74, No. 5
0099-2240/08/$08.00+0 doi:10.1128/AEM.02403-07
Copyright © 2008, American Society for Microbiology. All Rights Reserved.

INRA, University of Burgundy, Soil and Environmental Microbiology, CMSE, 17 Rue Sully, B.P. 86510, 21065 Dijon Cedex, France
Received 25 October 2007/ Accepted 3 January 2008
We investigated the effects of internal primer-template mismatches on the efficiency of PCR amplification using the 16S rRNA gene as the model template DNA. We observed that the presence of a single mismatch in the second half of the primer extension sequence can result in an underestimation of up to 1,000-fold of the gene copy number, depending on the primer and position of the mismatch.
Published ahead of print on 11 January 2008.
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