Computer program for analyzing donor photobleaching FRET image series

Gergely Szentesi, György Vereb, Gábor Horváth, Andrea Bodnár, Ákos Fábián, János Matkó, Rezso Gáspár, Sándor Damjanovich, László Mátyus, Attila Jenei

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Background: The photobleaching fluorescence resonance energy transfer (pbFRET) technique is a spectroscopic method to measure proximity relations between fluorescently labeled macromolecules using digital imaging microscopy. To calculate the energy transfer values one has to determine the bleaching time constants in pixel-by-pixel fashion from the image series recorded on the donor-only and donor and acceptor double-labeled samples. Because of the large number of pixels and the time-consuming calculations, this procedure should be assisted by powerful image data processing software. There is no commercially available software that is able to fulfill these requirements. Methods: New evaluation software was developed to analyze pbFRET data for Windows platform in National Instrument LabVIEW 6.1. This development environment contains a mathematical virtual instrument package, in which the Levenberg-Marquardt routine is also included. As a reference experiment, FRET efficiency between the two chains (β2-microglobulin and heavy chain) of major histocompatibility complex (MHC) class I glycoproteins and FRET between MHC I and MHC II molecules were determined in the plasma membrane of JY, human B lymphoma cells. Results: The bleaching time constants calculated on pixel-by-pixel basis can be displayed as a color-coded map or as a histogram from raw image format. Conclusion: In this report we introduce a new version of pbFRET analysis and data processing software that is able to generate a full analysis pattern of donor photobleaching image series under various conditions.

Original languageEnglish
Pages (from-to)119-128
Number of pages10
JournalCytometry Part A
Volume67
Issue number2
DOIs
Publication statusPublished - Oct 1 2005

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Keywords

  • Computer program
  • LabVIEW
  • Photobleaching
  • Photobleaching fluorescence resonance energy transfer

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Histology
  • Cell Biology

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