Data from: Slippage of degenerate primers can cause variation in amplicon length

Vasco Elbrecht, Paul D. N. Hebert & Dirk Steinke
It is well understood that homopolymer regions should be avoided for primer binding to prevent off-target amplification. However, in metabarcoding, it is often difficult to avoid primer degeneracy in order to maximize taxa detection. We here investigate primer binding specificity using different primer sets from several invertebrate metabarcoding studies. Our results indicate that primers frequently bound 1-2 bp upstream in taxa where a homopolymer region was present in the amplification direction. Primer binding 1 bp...
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