Design qPCR Primers in Seconds — Without the Manual Grind

Designing qPCR primers is one of those tasks that sounds simple but quietly eats an afternoon. You pull the mRNA sequence, hunt for exon–exon junctions, run Primer3, tweak parameters, check specificity, and cross-reference isoforms — all before you can even order oligos. BioTransfer's qPCR Primer Designer collapses that whole workflow into a single step: type a gene name, get ready-to-order primers.

What it does

Give it a human or mouse gene — a symbol, a RefSeq accession, or an Ensembl transcript ID — and it:

• Designs primers with Primer3 over the gene's RefSeq mRNA — Tm ≈ 60 °C, 70–200 bp amplicons.
• Prefers exon-junction-spanning pairs so genomic-DNA contamination won't amplify — the gold standard for RT-qPCR primer design.
• Verifies specificity with a one-click UCSC In-Silico PCR link for every pair.
• Exports an order-ready CSV for IDT or Sigma.

Why exon-junction primers matter

A primer pair that spans an exon–exon junction only anneals to spliced mRNA — not to contaminating genomic DNA. That single design choice removes a whole class of false positives in gene-expression analysis. The tool ranks junction-spanning pairs first, so the best option is always the top result.

Isoform-specific primers, made easy

Need primers that hit one transcript variant? The tool classifies a gene's isoforms, shows which exons are truly unique, and designs primers into that unique region — then runs its own in-silico PCR across every isoform to prove specificity. That's isoform-specific qPCR primer design without the manual coordinate math.

Now inside your AI assistant

The same engine is available as a Claude connector and a ChatGPT GPT — just ask "Design qPCR primers for TP53" in your chat and get verified designs with links back to the full tool. The AI never invents sequences; every primer comes from the real Primer3 backend, always with a verification link.

Have a gene in mind? Start with TP53, or explore isoform-specific designs in the Isoform Primer Designer.