Menu
March 19, 2026

How does HiFi long-read detect DNA methylation?

HiFi sequencing detects methylation directly from native DNA, automatically, in every run—no extra assays required. 

It works by measuring subtle changes in polymerase kinetics as modified bases (such as 5mC) are incorporated during sequencing. 

This enables: 

  • Direct, nucleotide-level methylation detection 
  • Simultaneous variant + methylation analysis 
  • 5-base multiomic sequencing in a single assay 

In contrast, short-read platforms typically require separate methods such as bisulfite sequencing (which can damage DNA) or arrays (which sample only a fraction of CpG sites). 

With HiFi—and advanced assays like Fiber-seq—researchers can link genetic variation, methylation, and chromatin accessibility at single-molecule resolution. 

Explore PacBio Epigenetic solutions 

Talk with an expert

If you have a question, need to check the status of an order, or are interested in purchasing an instrument, we're here to help.