Multiplexed single-molecule assay for enzymatic activity on flow-stretched DNA

Sangjin Kim, Paul C. Blainey, Charles M. Schroeder, X. Sunney Xie

Research output: Contribution to journalArticlepeer-review


We report a single-molecule assay for nucleic-acid enzymes on flow-stretched DNA templates. To facilitate the detection of slow or intermittent enzymatic activities, we developed the assay with 15-nm spatial resolution at a frame rate of 1 Hz and ∼10 nm mechanical stability over the timescale of hours. With multiplexed data collection, we applied the assay to φ29 DNA polymerase, HIV-1 reverse transcriptase, λ exonuclease and Escherichia coli RNA polymerase.

Original languageEnglish (US)
Pages (from-to)397-399
Number of pages3
JournalNature Methods
Issue number5
StatePublished - May 2007
Externally publishedYes

ASJC Scopus subject areas

  • Biotechnology
  • Biochemistry
  • Molecular Biology
  • Cell Biology


Dive into the research topics of 'Multiplexed single-molecule assay for enzymatic activity on flow-stretched DNA'. Together they form a unique fingerprint.

Cite this