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Why Live Imaging?1.Confocal and Multi-photon Fluorescence Microscopy 2 Why Live Imaging?1.Confocal and Multi-photon Fluorescence Microscopy 2

Why Live Imaging?1.Confocal and Multi-photon Fluorescence Microscopy 2 - PDF document

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Why Live Imaging?1.Confocal and Multi-photon Fluorescence Microscopy 2 - PPT Presentation

httpwwwglassbottomdishescom Medium aging where fluorescent molecules are Information regarding protein mobilitymeasuring the rate of fluorescenc Why Does Fluorescence Recover PrebleachPartia ID: 831932

frap diffusion gfp recovery diffusion frap recovery gfp binding uncoupled coupled fluorescent protein mobility transcription molecule pre time information

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Presentation Transcript

Why Live Imaging?1.Confocal and Multi-ph
Why Live Imaging?1.Confocal and Multi-photon Fluorescence Mi

croscopy 2.Green Fluorescent Protein (GF
croscopy 2.Green Fluorescent Protein (GFPs)http://www.glass

-bottom-dishes.com/Mediumaging where f
-bottom-dishes.com/Mediumaging where fluorescent molecules

are Information regarding protein mobil
are Information regarding protein mobilitymeasuring the rat

e of fluorescencWhy Does Fluorescence R
e of fluorescencWhy Does Fluorescence Recover?Pre-bleachPa

rtial recoveryFull recovery(Pure Diffus
rtial recoveryFull recovery(Pure Diffusion FRAP)(first pos

tbleachintensity)) / 2)halfZ2/(4 ●t1/
tbleachintensity)) / 2)halfZ2/(4 ●t1/2 )where Zis the rad

ius of bleached areaMore accurate estima
ius of bleached areaMore accurate estimates of D can be FRA

P Experiments at DBC•Chromatin structur
P Experiments at DBC•Chromatin structure •Transcription •mR

NA mobility •Protein recycling •Signal t
NA mobility •Protein recycling •Signal transduction •Cytoske

letaldynamics •Vesicle transport •Cell a
letaldynamics •Vesicle transport •Cell adhesion •Mitosisf~

50 kDaGFP-histoneH2BMolecular massto cro
50 kDaGFP-histoneH2BMolecular massto cross the nucleusDiffu

sion of proteins in the nucleusConclusio
sion of proteins in the nucleusConclusionGFP-HMG-17,GFP-SF2

/ASF and GFP-fibrillarin) mobility in th
/ASF and GFP-fibrillarin) mobility in the nucleoplasmof livi

ng cells. The lower mobility of the fus
ng cells. The lower mobility of the fusion with the Splici

ng Factor Compartments (SFC)1.Associati
ng Factor Compartments (SFC)1.Association of GFP-SF2/AS2.Im

morbilefraction ~ 10% indicating virtual
morbilefraction ~ 10% indicating virtuall3.Inhibition of tra

nscription by -amanitinaccelerates the r
nscription by -amanitinaccelerates the reassociationof GFP-t

he absence of nucleoplasmicbinding Quan
he absence of nucleoplasmicbinding Quantitative analysis of

binding reactions by FRAPa. Diffusion-u
binding reactions by FRAPa. Diffusion-uncoupled FRAP recove

riesThe diffusion time is much shorter t
riesThe diffusion time is much shorter than the time to begi

n binding. Consequently, recovery due t
n binding. Consequently, recovery due to diffusion occurs f

irst and recovery due to binding follows
irst and recovery due to binding follows later, resulting in

a FRAP curve that can be separated into
a FRAP curve that can be separated into two phases. Fluor

escent moleculeBleached moleculeBindin
escent moleculeBleached moleculeBinding sitermixed throug

hout the recovery, the FRAP Distinguish
hout the recovery, the FRAP Distinguishing diffusion-couple

d from diffusion-uncoupled FRAPDifferent
d from diffusion-uncoupled FRAPDifferent behavior arise depe

nding on whether the FRAP recovery is di
nding on whether the FRAP recovery is diffusion coupled or u

ncoupled, therefore, it is esstwo situat
ncoupled, therefore, it is esstwo situations for correctly e

xtracting binding information from FRAP
xtracting binding information from FRAP data.ent size and c

ompare recoDiffusion coupledDiffusion
ompare recoDiffusion coupledDiffusion uncoupledDoing FRAP

with ZeissLSM510 Meta SystemClick to s
with ZeissLSM510 Meta SystemClick to start to define the b

leach areaDoing FRAP with ZeissLSM510 M
leach areaDoing FRAP with ZeissLSM510 Meta SystemChoose th

e shape of Locate the bleaching area on
e shape of Locate the bleaching area on the pre-acquired ima