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Table 3 Parameter settings relaxed for round three in the primer design process.

From: DATFAP: A Database of Primers and Homology Alignments for Transcription Factors from 13 Plant Species

Primer length, round 3

16 – 28 nucleotides

Product length, round 3

80 – 200 nucleotides

Max. primer melting temperature diff., round 3

4.0 °

Max. base repeat, round 3

4 (e.g., GGGG in a primer is allowed, although not in the 3'-end)