Primer design using NIH's Primer-BLAST tool.

Pedro C. Díaz, Francisco Franco García Calderon

Published: 2024-04-23 DOI: 10.17504/protocols.io.rm7vzj8j5lx1/v1

Abstract

This protocol demonstrates the basic usage of the Primer-BLAST tool in order to design PCR primers from a given FASTA sequence.

The results should show the sequence of at least one pair of primers (forward and reverse) within the chosen parameters.

Steps

Go to NIH's Primer-BLAST tool

1.

Open your internet browser (Google Chrome recommended).

Enter FASTA sequence

3.
Screenshot of the PCR Template section with the corresponding text box.
Screenshot of the PCR Template section with the corresponding text box.

Copy and paste your FASTA sequence in the text box or upload a FASTA file using the ¨Choose File¨ button.

4.

You can select a custom range (i.e. the positional value of the first and last nucleotide of your ROI) for the forward and reverse primers.

Enter primer parameters

5.
Screenshot of the Primer Parameters and Exon/intron selection sections.
Screenshot of the Primer Parameters and Exon/intron selection sections.

Enter the optimal parameters for your primers. Depending on your application, the PCR product size and the primer Melting temperatures are extremely important values!

Analyze

6.
Screenshot of the Get Primers button.
Screenshot of the Get Primers button.

Click on the ¨Get Primers¨ button.

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