Single-fluorophore imaging with an unmodified epifluorescence microscope and conventional video camera

K. Adachi, K. Kinosita, T. Ando

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Single fluorophores in aqueous solution were imaged in real time with a conventional silicon-intensified target video camera connected to an unmodified commercial microscope (IX70, Olympus) with epifluorescence excitation with a high-pressure mercury lamp. Neither a powerful laser nor an extremely sensitive video camera was required. Three experimental systems were used to demonstrate quantitatively that individual, moving or stationary Cy3 fluorophores could be imaged with the microscope: Cy3-gelsolin attached to an actin filament sliding over heavy meromyosin, sliding actin filaments sparsely labelled with Cy3, and heavy meromyosin labelled with one or two Cy3 fluorophores. The results should encourage many laboratories to attempt 'single-molecule physiology' in which the functions and mechanisms of molecular machines are studied at the single-molecule level in an environment where the biological machines are fully active.

Original languageEnglish
Pages (from-to)125-132
Number of pages8
JournalJournal of Microscopy
Volume195
Issue number2
DOIs
Publication statusPublished - 1999
Externally publishedYes

Fingerprint

Myosin Subfragments
Fluorophores
Video cameras
Actin Cytoskeleton
sliding
filaments
Microscopes
cameras
microscopes
Gelsolin
Imaging techniques
mercury lamps
physiology
Silicon
Mercury
Mercury vapor lamps
molecules
Molecules
Lasers
Physiology

Keywords

  • Cy3
  • Epifluorescence microscope
  • Single-molecule imaging
  • SIT camera

ASJC Scopus subject areas

  • Instrumentation

Cite this

Single-fluorophore imaging with an unmodified epifluorescence microscope and conventional video camera. / Adachi, K.; Kinosita, K.; Ando, T.

In: Journal of Microscopy, Vol. 195, No. 2, 1999, p. 125-132.

Research output: Contribution to journalArticle

Adachi, K. ; Kinosita, K. ; Ando, T. / Single-fluorophore imaging with an unmodified epifluorescence microscope and conventional video camera. In: Journal of Microscopy. 1999 ; Vol. 195, No. 2. pp. 125-132.
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