measurement of absolute values of chemiluminescence and bioluminescence and these quantum yields...
TRANSCRIPT
Measurement of absolute values of chemiluminescence and bioluminescence and the
se quantum yields
ISSP Univ. of TokyoA, CRESTB ・ JST
ATTO Corp.C, AISTD, Shizuoka Univ.E
Yoriko AndoA,B, N.YamadaC, T.IrieC, T.EnomotoC
H.KubotaB,C, K.NiwaE, K.OhmiyaD,E, H.AkiyamaA,B
ContentsContents
• Development of system measuring quantum yield of bioluminescence and chemiluminescence
• Quantum yield of Luminol
early study : 1.24% by Lee & Seliger (1965)
• Quantum yield of Firefly bioluminescence
early study : 88% by Seliger & Mcelroy (1959)
① ① OpticsOptics• Reflectance and Transmittance measured by rock-in detection
② ② Sensitivity of detectorSensitivity of detector• Sensitivity of CCD calibrated by 4 kinds of lasers • Wavelength dependence calibrated by W lamp and optical spec
trum analyzer
③ ③ Luminescence collection efficiency Luminescence collection efficiency with micro wellwith micro well• Collection efficiency with white and transparent micro well to
lens system calibrated by thin transparent plate cell.
CalibrationCalibration
Comparison between Comparison between conventional system and our systemconventional system and our system
Conventional Our systemDetector Photomultiplier Cooled CCD camera
Calibrated by
NBS standard lamp
Total radiation standard lamp
Standard color temperature lamp
Power meter + lasers
OSA + W lamp
features
Glass tube technique High voltage
aging effect
High DC noise(dark current, 1/f noise)
Semiconductor technique
Low voltage
Low aging effect
Low DC noise
optics - Lens, mirror
Collection
efficiencyPoint light source approximation
Calibrated by reference transparent plate cell
121mm87mm
↑White or Transparentmicro well ( 4×4×8.5mm3 )full 100μ l
lens(f=50)
← Substrate solution
↑Long cut filter
Trigger solution →
cooledCCD PCSpectro-
meter
IrisMirror
Grating : spectroscopyMirror : imaging of spectrally integrated light
Experimental setupExperimental setup
Calibration ② Calibration ② CCD sensitivity & wavelength CCD sensitivity & wavelength
dependencedependence
Laser (nm) CCD conversion rate
(photon/count)
633 6.04
532 8.61
476.5 9.23
457.9 10.64
ImageImage
(CCD)(CCD)
SpectroscopySpectroscopy
(( CCD CCD & & spectrometerspectrometer ))
NAext = sinθ=0.1347
NAint = sinθ/nint =0.1011
solid angle η={1-(1-NAint 2)1/2} / 2
=0.256(%)
Cover glass 0.1mm
Plastic plate 0.79mm
Mask
substrate solution
4mm
referencereference :: collection efficiency can be accurately estimated collection efficiency can be accurately estimated for a transparent plate cellfor a transparent plate cell
Reference substrate solutionReference substrate solutionピッカジーン LT7.5 ( TOYO B-Net )Half-life more than 7.5hours
Calibration ③ Collection Calibration ③ Collection efficiencyefficiency
i
θ
nint=1.33
next =1.0
Substrate solution→
a
r
θ
a : 10 (mm) r : 74 (mm)
lens
volume = 4 x 4 x 0.79mm3
iris
Top view
Side view
Intensity(count/s/μl)
Normalized by transparent plate cell
η (%)
Transparent plate cell
(4×4×0.79mm3)1.00 0.2560.256
Whitemicro well
(4×4×8.5mm3) 6.001.5361.536
Transparentmicro well
(4×4×8.5mm3)0.73 0.1970.197
Collection efficiency Collection efficiency with white & transparent micro wellwith white & transparent micro well
reference : KIRIYA CHEMI Home page
Luciferase(enztme),
ATP, Mg+
Luciferin (substrate)
pH < 7
pH > 7.6
Process of light emission : Process of light emission : FireflyFirefly
oxyluciferin
Singlet exited state Singlet exited state
Singlet exited state
Red lightRed light
Yellow green Yellow green lightlight
Ground
state
Ground
state
O2+
ホタルルシフェリン量子収率測定ホタルルシフェリン量子収率測定
Luciferin + ATP------------- Luciferyl- AMP・ Luciferase+ P -P
Luciferyl- AMP・ Luciferase------------------
Product + Luciferase + hh νν
Mg 2+ , Luciferase
O2+
発光過程発光過程
Concentration(M )
Volume( μ l) Final (M)
Final (M)Seliger et al.(1959)
Luciferin(SIGMA/PROMEGA/DOJINDO)
1.0×10-7 5 5.0×10-9 4.2×10-9
Luciferase (WAKO)
2.0×10-5 5 1.0×10-6 4.2×10-8
MgSO4 0.1 5 5.0×10-3 4.2×10-3
ATP 1.0×10-3 50 5.0×10-4 4.2×10-4
Glygly (pH7.6) 0.025 35 8.75×10-
3 2.1×10-2
P
hot
olu
min
esce
nce
inte
nsi
ty (
ph
oton
/0.5
nm
)P
hot
olu
min
esce
nce
inte
nsi
ty (
ph
oton
/0.5
nm
) Luminescence spectrum Luminescence spectrum and Quantum Yield : and Quantum Yield : FireflyFirefly
With white micro well Photons 8.24×1010
Molecules 2.77×1011
QY 29.01 %
spectrometer マイクロウェル 分子数 CCD total count 変換換算値 Photon数 (%)量子効率全光 white 2.77E+11 1.290E+08 8.7545.E- 04 6.440E+10 53.196
white 2.77E+11 1.330E+08 8.7545.E- 04 6.420E+10 54.845white 2.77E+11 1.220E+08 8.7545.E- 04 5.890E+10 50.309white 2.77E+11 1.110E+08 8.7545.E- 04 5.340E+10 45.773white 2.77E+11 1.020E+08 8.7545.E- 04 4.910E+10 42.062white 2.77E+11 1.010E+08 8.7545.E- 04 4.850E+10 41.650white 2.77E+11 7.727E+07 8.9079.E- 04 8.674E+10 31.315white 2.77E+11 9.347E+07 8.9079.E- 04 1.049E+11 37.880white 2.77E+11 8.634E+07 8.9079.E- 04 9.692E+10 34.990white 2.77E+11 8.045E+07 8.9079.E- 04 9.031E+10 32.603white 2.77E+11 7.617E+07 8.9079.E- 04 8.551E+10 30.871clear 2.77E+11 1.442E+07 1.0904.E- 04 1.322E+11 47.742clear 2.77E+11 1.151E+07 1.0904.E- 04 1.056E+11 38.121clear 2.77E+11 1.291E+07 1.0904.E- 04 1.184E+11 42.749
分光 white 2.77E+11 2.991E+06 3.7223.E- 05 8.035E+10 29.008white 2.77E+11 3.644E+06 3.7223.E- 05 9.790E+10 35.341white 2.77E+11 3.714E+06 3.7223.E- 05 9.978E+10 36.020clear 2.77E+11 5.629E+05 5.1432.E- 06 1.094E+11 39.5109clear 2.77E+11 4.886E+05 5.1432.E- 06 9.500E+10 34.2956
Concentration(M )
Volume ( μl) Final (M)
Final (M)Methods in Enzymology
(vol.305)
Luminol1.0×10-6 ~
1.0×10-750
5×10-7 ~5×10-8
1.0×10-6 ~1.0×10-8
H2O2 0.1 2 2×10-31.0×10-3 ~
1.0×10-5
Horseradishperoxidase
1.0×10-6 50 5×10-7 2.0×10-7
*
ルミノール
++ hh ννH2O
2
HRP
*
Luminol
Anionic luminol
Process of light emission : Process of light emission : LuminolLuminol
reference : LUMIKA CORPORATION Home page
Luminescence spectrum Luminescence spectrum and Quantum Yield : and Quantum Yield : LuminolLuminol
Transparent micro well Photons 5.79×1011
molecules 3.01×1013
QY 1.84 %
spectrometer マイクロウェル Luminol (M)濃度 分子数 CCD total count 変換換算値 Photon数 (%)量子効率 (%)量子効率 平均全光 clear 1.00E- 07 3.01E+12 3.5897E+06 7.31E- 05 5.25.E+10 1.632
clear 1.00E- 07 3.01E+12 3.5891E+06 7.31E- 05 5.25.E+10 1.631
clear 1.00E- 06 3.01E+13 3.4385E+07 7.31E- 05 5.03.E+11 1.563
clear 1.00E- 07 3.01E+12 4.331E+06 7.31E- 05 6.34.E+10 1.969
clear 1.00E- 07 3.01E+12 3.790E+06 7.31E- 05 5.54.E+10 1.723
clear 1.00E- 07 3.01E+12 4.416E+06 7.31E- 05 6.46.E+10 2.007clear 1.00E- 07 3.01E+12 4.478E+06 7.31E- 05 6.55.E+10 2.035
分光 clear 1.00E- 06 3.01E+13 1.898E+06 3.43E- 06 5.79.E+11 1.839clear 1.00E- 06 3.01E+13 1.680E+06 3.43E- 06 5.12.E+11 1.328clear 1.00E- 06 3.01E+13 1.423E+06 3.43E- 06 4.34.E+11 1.379 1.71± 0.25
Our result
Early study Comment
Luminol 1.7 % 1.24 %[Lee & Seliger (1965)]
while Lee & Seliger estimate that collection efficiency is 1, we estimate it is 0.7.(1.7×0.7≒1.2)
Fireflyluciferin
30 ~ 50 %
88±25 %[Seliger & Mcelroy ( 1
959 ) ]
We observed large fluctuation in yieelds, similarly to the early result.This is due to pH instability of glycylglycin buffer.<Problems of early study> ・ stability of buffer ・ Purity of luciferin(optical isomer) ・ Lee et al. measurements →about60%(private communication) ・ Measurements.
SummarySummary
Future plansFuture plans• Measure firefly quantum yield again using bufferMeasure firefly quantum yield again using buffer
which is available around pH8. which is available around pH8.
• Development and spread high sensitivity system measures absolute values of luminescence(?).
• Development of system measuring quantum yield of photoluminescence(?).
ηchemiluminescence= ηreaction× ηsinglet exited state× ηluminescence
• Quantitative micro-spectrophotometry image measurment of living cells.