Fluorescence correlation spectroscopy in small cytosolic compartments depends critically on the diffusion model used

Arne Gennerich, Detlev Schild

Research output: Contribution to journalArticle

91 Citations (Scopus)

Abstract

Fluorescence correlation spectroscopy (FCS) is a powerful technique for measuring low concentrations of fluorescent molecules and their diffusion constants. In the standard case, fluorescence fluctuations are measured in an open detection volume defined by the confocal optics. However, if FCS measurements are carried out in cellular processes that confine the detection volume, the standard FCS model leads to erroneous results. In this paper, we derive a modified FCS model that takes into account the confinement of the detection volume. Using this model, we have carried out the first FCS measurements in dendrites of cultured neurons. We further derive, for the case of confined diffusion, the limits within which the standard two- and three-dimensional diffusion models give reliable results.

Original languageEnglish (US)
Pages (from-to)3294-3306
Number of pages13
JournalBiophysical Journal
Volume79
Issue number6
StatePublished - Dec 2000
Externally publishedYes

Fingerprint

Fluorescence Spectrometry
Dendrites
Fluorescence
Neurons

ASJC Scopus subject areas

  • Biophysics

Cite this

Fluorescence correlation spectroscopy in small cytosolic compartments depends critically on the diffusion model used. / Gennerich, Arne; Schild, Detlev.

In: Biophysical Journal, Vol. 79, No. 6, 12.2000, p. 3294-3306.

Research output: Contribution to journalArticle

@article{7dd0082e36884fefaa2c3dbcfe5f666a,
title = "Fluorescence correlation spectroscopy in small cytosolic compartments depends critically on the diffusion model used",
abstract = "Fluorescence correlation spectroscopy (FCS) is a powerful technique for measuring low concentrations of fluorescent molecules and their diffusion constants. In the standard case, fluorescence fluctuations are measured in an open detection volume defined by the confocal optics. However, if FCS measurements are carried out in cellular processes that confine the detection volume, the standard FCS model leads to erroneous results. In this paper, we derive a modified FCS model that takes into account the confinement of the detection volume. Using this model, we have carried out the first FCS measurements in dendrites of cultured neurons. We further derive, for the case of confined diffusion, the limits within which the standard two- and three-dimensional diffusion models give reliable results.",
author = "Arne Gennerich and Detlev Schild",
year = "2000",
month = "12",
language = "English (US)",
volume = "79",
pages = "3294--3306",
journal = "Biophysical Journal",
issn = "0006-3495",
publisher = "Biophysical Society",
number = "6",

}

TY - JOUR

T1 - Fluorescence correlation spectroscopy in small cytosolic compartments depends critically on the diffusion model used

AU - Gennerich, Arne

AU - Schild, Detlev

PY - 2000/12

Y1 - 2000/12

N2 - Fluorescence correlation spectroscopy (FCS) is a powerful technique for measuring low concentrations of fluorescent molecules and their diffusion constants. In the standard case, fluorescence fluctuations are measured in an open detection volume defined by the confocal optics. However, if FCS measurements are carried out in cellular processes that confine the detection volume, the standard FCS model leads to erroneous results. In this paper, we derive a modified FCS model that takes into account the confinement of the detection volume. Using this model, we have carried out the first FCS measurements in dendrites of cultured neurons. We further derive, for the case of confined diffusion, the limits within which the standard two- and three-dimensional diffusion models give reliable results.

AB - Fluorescence correlation spectroscopy (FCS) is a powerful technique for measuring low concentrations of fluorescent molecules and their diffusion constants. In the standard case, fluorescence fluctuations are measured in an open detection volume defined by the confocal optics. However, if FCS measurements are carried out in cellular processes that confine the detection volume, the standard FCS model leads to erroneous results. In this paper, we derive a modified FCS model that takes into account the confinement of the detection volume. Using this model, we have carried out the first FCS measurements in dendrites of cultured neurons. We further derive, for the case of confined diffusion, the limits within which the standard two- and three-dimensional diffusion models give reliable results.

UR - http://www.scopus.com/inward/record.url?scp=0033635801&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0033635801&partnerID=8YFLogxK

M3 - Article

VL - 79

SP - 3294

EP - 3306

JO - Biophysical Journal

JF - Biophysical Journal

SN - 0006-3495

IS - 6

ER -