Are you looking for a dPCR assay for your region of interest? We offer more than 120,000 dPCR assays, many of them wet-lab verified and ready for immediate use. From DNA to miRNA, from oncology to microbiology, we cover all types of analytes and digital PCR applications.
Analytes | |||
|---|---|---|---|
| Amplicon Length | Shorter amplicons between 60–150 bp | Similar to DNA: keep short (<150 bp) | Very short ~18–24 nt; stem-loop or specialized RT primers used with amplicon usually ~60 bp after RT |
| Primer Design | GC content of about ~40–60% to reduce primer dimers and secondary structures | Same as DNA; use primers designed against spliced sequences if targeting mRNA | LNA modifications can enhance binding and specificity |
| Probe Design | Probe Tm 8–10°C higher than primers; design probes without a guanine at the 5' end to maximize fluorescence signal | Same as DNA probes; hydrolysis probes are preferable for multiplexing | LNA probes can increase mismatch discrimination and signal strength |
| Specificity | Use BLAST to confirm targets; use LNA probes for SNP discrimination | Design primers across splice junctions or target conserved regions or use LNA probes for better binding specificitiy | Critical due to miRNA family homology; design highly specific LNA probes and primers |
| Assay Optimization | Optimize annealing temperature (consider running a gradient), primer/probe concentration (consider running a dilution series) | Optimize RT conditions and input variability control | Include RT efficiency controls; fine-tune probe conc. |
| Controls | Use no-template controls (NTC), positive controls and reference genes for normalization and contamination check | Include RT-minus controls to check genomic DNA contamination, external RNA controls, and spike-ins to assess RT efficiency and variability | Use synthetic spike-ins, no-RT controls, positive controls; normalizers such as small nuclear RNAs or exogenous controls to correct sample-to-sample variability |
“With GeneGlobe, you can find more than 90,000 dPCR targets for any application from oncology to microbiology. And if your region of interest is still missing, there are often tools for creating your own custom dPCR assay.”
Dr. Colin Donohoe, Associate Director R&D, QIAGEN