A primer is short oligo made from nucleic acids. It is the starting point for DNA polymerases to start DNA synthesis. DNA polymerases can only synthesize enlarge existing nucleic but not generate new ones 'de novo'. Primers can be made of DNA (for PCR) or RNA (naturally occuring).

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Primer Design with Primer-BLAST over specific site

I am trying to design primers using Primer-BLAST such that the forward primer spans a specific base pair site. I am looking at KRAS for which I believe the RefSeq ID is NG_007524.1 and the forward ...
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Multiplex PCR, shorter amplicon inhibiting longer amplicon?

I want to run multiplex PCRs for my genotyping, with a primer pair targeting my construct and a primer pair targeting some housekeeping gene (sort of a built-in control). I designed the control ...
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Primer heterodimer problem

I design my primers in Primer3PLUS and analyze them in Oligoanalyzer3.1, A big problem that I have this is that I got very nice output in NCBI-Primer BLAST for their specificity but a very negative ΔG ...