Dear Confocal Listserv readers,
If any of your favorite fluorescent dyes (small molecules, not
fluorescent proteins) are not in the draft table below, please
send them to me in the same column format, and I can add them to
my draft. The table should appear in my Current Protocols chapter,
and sooner online at http://www.geomcnamara.com/data which already
has a fluorescent proteins data table (not photo$able FPs) and
very basic list of FP biosensors. You are free to repost: data are
facts, facts are not copyrightable.
Enjoy,
George
Table
4.4.2 Fluorophores
Photophysics Data
Fluorophore |
Abs
or Ex max (nm) |
Em
max (nm) |
Extinction
Coefficient |
Quantum
Yield |
Brightness
Index |
Acridine
orange |
271 |
520 |
27,000 |
0.20 |
5 |
Alexa
Fluor 430 |
431 |
541 |
16,000 |
0.55 |
9 |
Alexa
Fluor 488 |
495 |
519 |
71,000 |
0.94 |
67 |
Alexa
Fluor 532 |
532 |
553 |
81,000 |
0.80 |
65 |
Alexa
Fluor 546 |
556 |
573 |
104,000 |
0.96 |
100 |
Alexa
Fluor 568 |
578 |
603 |
91,300 |
0.75 |
69 |
Alexa
Fluor 594 |
590 |
617 |
73,000 |
0.64 |
47 |
Allophycocyanin
(APC) |
650 |
660 |
700,000 |
0.68 |
476 |
Atto
390 |
390 |
479 |
24,000 |
0.90 |
22 |
Atto
425 |
436 |
484 |
45,000 |
0.65 |
29 |
Atto
430LS |
433 |
547 |
32,000 |
0.65 |
21 |
Atto
465 |
453 |
508 |
75,000 |
0.75 |
56 |
Atto
490LS |
496 |
661 |
40,000 |
0.30 |
12 |
Atto
520 |
525 |
547 |
105,000 |
0.95 |
100 |
Atto
532 |
534 |
560 |
115,000 |
0.90 |
104 |
Atto
565 |
566 |
590 |
120,000 |
0.97 |
116 |
Atto
590 |
598 |
634 |
120,000 |
0.90 |
108 |
Atto
610 |
616 |
646 |
150,000 |
0.70 |
105 |
Atto
620 |
620 |
641 |
120,000 |
0.50 |
60 |
Atto
635 |
637 |
660 |
120,000 |
0.45 |
54 |
Atto
655 |
655 |
680 |
125,000 |
0.50 |
63 |
Atto
680 |
675 |
699 |
125,000 |
0.40 |
50 |
ATTO-Dino
1 (dsDNA) |
490 |
531 |
179,000 |
0.70 |
125 |
ATTO-Dino
2 (dsDNA) |
506 |
535 |
162,000 |
0.70 |
113 |
Bacteriochlorin
(“BC”) |
713 |
717 |
120,000 |
0.11 |
13 |
Bacteriochlorin
BC-T2-T12 |
737 |
744 |
120,000 |
0.14 |
17 |
Bacteriochlorin
BC-Ph3-Ph13 |
736 |
742 |
120,000 |
0.12 |
14 |
Bacteriochlorin
BC-T2-OMe5-T12 |
732 |
739 |
120,000 |
0.18 |
22 |
Bacteriochlorin
BC-V3-V13 |
750 |
756 |
120,000 |
0.10 |
12 |
Bacteriochlorin
BC-PE3-PE13 |
763 |
768 |
120,000 |
0.15 |
18 |
Bacteriochlorin
BC-A3-A13 |
768 |
774 |
120,000 |
0.09 |
11 |
Bacteriochlorin
BC-F3-F13 |
771 |
777 |
120,000 |
0.07 |
8 |
BODIPY
507/545 |
513 |
549 |
82,800 |
0.73 |
60 |
BODIPY
FL |
504 |
510 |
70,000 |
0.90 |
63 |
BODIPY
TR |
588 |
616 |
68,000 |
0.84 |
57 |
B-phycoerythrin
(B-PE) |
545 |
575 |
2,410,000 |
0.98 |
2,362 |
Calcein |
494 |
516 |
81,000 |
0.78 |
63 |
Cascade
Blue |
378 |
423 |
26,000 |
0.54 |
14 |
Chromeo
488 |
488 |
517 |
73,000 |
0.27 |
20 |
Chromeo
494 |
494 |
628 |
55,000 |
0.15 |
8 |
Chromeo
505 |
505 |
526 |
70,000 |
0.30 |
21 |
Chromeo
546 |
545 |
561 |
98,800 |
0.15 |
15 |
Chromeo
642 |
642 |
660 |
180,000 |
0.21 |
38 |
Chromeo
P429 Py-Dye |
429 |
536 |
75,000 |
0.10 |
8 |
Chromeo
P503 Py-Dye |
503 |
600 |
24,000 |
0.50 |
12 |
Chromeo
P540 Py-Dye |
533 |
627 |
50,000 |
0.20 |
10 |
Chromeo
P543 Py-Dye |
543 |
590 |
57,000 |
0.15 |
9 |
Coumarin
6 |
456 |
500 |
54,000 |
0.78 |
42 |
Cresyl
violet perchlorate |
603 |
622 |
83,000 |
0.54 |
45 |
Cy3 |
552 |
570 |
150,000 |
0.15 |
23 |
Cy3B |
552 |
570 |
130,000 |
0.67 |
87 |
Cy5 |
649 |
670 |
250,000 |
0.28 |
70 |
Cy5.5 |
675 |
694 |
250,000 |
0.23 |
58 |
Cy7 |
755 |
778 |
250,000 |
0.28 |
70 |
DAPI
(in DMSO) |
353 |
465 |
27,000 |
0.58 |
16 |
DAPI
(in H2O) |
344 |
487 |
27,000 |
0.04 |
1 |
DsRed
|
558 |
583 |
75,000 |
0.70 |
52 |
Eosin
Y |
525 |
543 |
112,000 |
0.67 |
75 |
EYFP |
514 |
527 |
84,000 |
0.61 |
51 |
Fluorescein |
490 |
514 |
90,000 |
0.92 |
83 |
Fluorescein
FH3+ (pH <3) |
437 |
- |
53,000 |
- |
- |
Fluorescein
FH2 (pH 4) |
434 |
- |
11,000 |
- |
- |
Fluorescein
FH- (pH 5.3) |
472 |
515 |
29,000 |
0.37 |
11 |
Fluorescein
F2- (pH >8) |
490 |
515 |
76,900 |
0.92 |
71 |
FM
1-43 |
479 |
598 |
40,000 |
0.30 |
12 |
Fura-2,
Ca++ free |
363 |
512 |
28,000 |
0.23 |
6 |
Fura-2,
Ca++ saturated |
335 |
505 |
34,000 |
0.49 |
17 |
Fura-2,
Mn++ saturated |
335 |
- |
- |
0 |
0 |
Fura-2,
Zn++ saturated |
345 |
505 |
34,000 |
0.69 |
24 |
Hoechst
33258 (in DMF) |
354 |
486 |
46,000 |
0.35 |
16 |
Hoechst
33258 (in H2O) |
345 |
507 |
46,000 |
0.03 |
2 |
Indo-1,
Ca++ free |
346 |
475 |
33,000 |
0.38 |
13 |
Indo-1,
Ca++ saturated |
330 |
401 |
33,000 |
0.56 |
18 |
IRDye38 |
778 |
806 |
179,000 |
0.35 |
62 |
IRDye40 |
768 |
788 |
140,000 |
0.38 |
53 |
IRDye700 |
681 |
712 |
170,000 |
0.48 |
81 |
IRDye78 |
768 |
796 |
220,000 |
0.31 |
68 |
IRDye80 |
767 |
791 |
250,000 |
0.21 |
53 |
IRDye800 |
787 |
812 |
275,000 |
0.15 |
41 |
JOE |
520 |
548 |
73,000 |
0.60 |
44 |
Lucifer
Yellow CH |
230 |
542 |
24,200 |
0.21 |
5 |
merocyanine
540 |
559 |
579 |
138,000 |
0.39 |
54 |
neo-Cy5
(DMSO) |
656 |
675 |
195,000 |
0.25 |
49 |
NIR1 |
761 |
796 |
268,000 |
0.23 |
62 |
NIR2 |
662 |
684 |
250,000 |
0.34 |
85 |
NIR3 |
750 |
777 |
275,000 |
0.28 |
77 |
NIR4 |
650 |
671 |
260,000 |
0.43 |
1112 |
Oregon
Green 488 |
496 |
516 |
76,000 |
0.90 |
68 |
Oregon
Green 514 |
506 |
526 |
88,000 |
0.96 |
85 |
Oyster®
- 645 (ethanol) |
651 |
669 |
250,000 |
0.40 |
100 |
Oyster®
- 656 (ethanol) |
665 |
684 |
220,000 |
0.50 |
11 |
Pacific
Blue |
400 |
447 |
29,500 |
0.55 |
16 |
Perylene |
253 |
435 |
38,500 |
0.94 |
36 |
Phenylalanine |
222 |
279 |
195 |
0.02 |
<0.1 |
POPOP |
256 |
407 |
47,000 |
0.93 |
44 |
Quinine
sulfate (in 0.5M H2SO4) |
256 |
451 |
5,700 |
0.55 |
3 |
Rhodamine
110 |
496 |
520 |
80,000 |
0.89 |
71 |
Rhodamine
6G |
530 |
552 |
116,000 |
0.95 |
110 |
Rhodamine
B |
543 |
565 |
106,000 |
0.70 |
74 |
Riboflavin |
262 |
531 |
34,800 |
0.37 |
13 |
Rose
bengal |
559 |
571 |
90,400 |
0.11 |
10 |
R-Phycoerythrin
(R-PE) |
480 |
578 |
1,960,000 |
0.68 |
1,333 |
SNIR1 |
666 |
695 |
218,000 |
0.24 |
52 |
SNIR3 |
667 |
697 |
245,000 |
0.24 |
59 |
Star
440 SXP |
436 |
515 |
22,700 |
0.68 |
15 |
Star
470 SXP |
472 |
624 |
29,000 |
0.12 |
4 |
Star
488 |
503 |
524 |
64,500 |
0.89 |
57 |
Star
512 |
511 |
530 |
84,000 |
0.82 |
69 |
Star
520SXP |
515 |
612 |
60,000 |
0.05 |
3 |
Star
580 |
587 |
607 |
72,000 |
0.90 |
65 |
Star
600 |
604 |
627 |
43,500 |
0.73 |
32 |
Star
635 |
639 |
654 |
63,000 |
0.51 |
32 |
Star
635P |
635 |
651 |
125,000 |
0.92 |
115 |
Star
Red |
638 |
655 |
212,000 |
0.90 |
191 |
Sulforhodamine
101 |
576 |
591 |
139,000 |
0.90 |
125 |
Texas
Red |
586 |
605 |
108,000 |
0.77 |
83 |
Texas
Red-X |
583 |
603 |
116,000 |
0.90 |
104 |
TMR |
540 |
565 |
95,000 |
0.68 |
65 |
Trp |
287 |
348 |
6,000 |
0.31 |
2 |
Tyr |
275 |
303 |
1,500 |
0.21 |
0.3 |
Brilliant
Violets, Brilliant Ultraviolets, Brilliant Blue |
|||||
Brilliant
Violet BV421 |
405 |
421 |
2,500,000 |
0.65 |
1,625 |
Brilliant
Violet BV510 |
405 |
510 |
577,000 |
0.44 |
254 |
Brilliant
Violet BV570 |
405 |
570 |
2,300,000 |
0.08 |
184 |
Brilliant
Violet BV605 |
405 |
603 |
2,400,000 |
0.29 |
696 |
Brilliant
Violet BV650 |
405 |
645 |
2,500,000 |
0.17 |
425 |
Brilliant
Violet BV711 |
405 |
711 |
2,800,000 |
0.15 |
420 |
Brilliant
Violet BV785 |
405 |
785 |
2,500,000 |
0.04 |
100 |
Brilliant
Ultraviolet BUV395 |
348 |
395 |
|
|
|
Brilliant
Ultraviolet BUV496 |
348 |
496 |
|
|
|
Brilliant
Ultraviolet BUV563 |
348 |
563 |
|
|
|
Brilliant
Ultraviolet BUV661 |
348 |
661 |
|
|
|
Brilliant
Ultraviolet BUV737 |
348 |
737 |
|
|
|
Brilliant
Ultraviolet BUV805 |
348 |
805 |
|
|
|
Brilliant
Blue BB515 |
490 |
515 |
|
|
|
Fluorescent
nanocrystal quantum dots |
|||||
Product |
Em
Peak |
Em
FWHM |
Extinction Coefficient |
Quantum
Yield |
Brightness Index |
QD525 |
525 |
≤32 |
320,000 |
0.60 |
192 |
QD565 |
565 |
≤34 |
1,100,000 |
0.40 |
440 |
QD585 |
585 |
≤34 |
2,200,000 |
0.40 |
880 |
QD605 |
605 |
≤27 |
2,400,000 |
0.40 |
960 |
QD625 |
625 |
|
|
|
>2,300 |
QD655 |
655 |
≤34 |
5,700,000 |
0.40 |
2,280 |
QD705 |
705 |
wide |
|
|
|
eVolve
605 |
605 |
|
|
|
|
eVolve
655 |
655 |
|
|
|
|
Brightness Index = Extinction
coefficient * Quantum
Yield / 1000. Table features fluorophores for which all four
major
photophysical parameters, absorption (excitation) maximum,
fluorescence
emission maximum extinction coefficient (M-1 cm-1)
and
fluorescence quantum yield, are available. QD625 values
details have not been
published, but is brighter than QD605 or QD655.
Antibody, streptavidin,
tetramers/pentamers/dextramers, and other macromolecular
labeling have “degree
of labeling’ (doL) issues. As a simplistic rule of thumb,
one fluorophore can
be conjugated to the surface of a protein for every 25,000
dalton molecular
weight. An IgG molecule is ~155,000 dalton, so ~6
fluorophores can be
conjugated without too much quenching or causing the protein
to crash out of
solution. With random labeling of lysines, such as
isothiocyantate chemistry
(FITC, TRITC), there is a risk of the reactive dye making a
covalent bond in an
Fab binding site, which would occlude binding to the target
antigen epitope. If
both Fabs were occluded, this dye-IgG would not bind
antigenic epitope at all,
but could bind non-specifically, increasing background. If
there are 50
reactive lysines on the surface of an IgG molecule, and
degree of labeling is 6
(+/- some variability), the population of antibody molecules
applied to a
specimen is going to be very heterogeneous: a small reaction
may not have any
identical antibody molecules. DoL of different batches of
antibodies are
unlikely to be identical. Isotype controls, whether a mouse
IgG1 monoclonal
antibody (defined specificity different than your interest),
or polyclonal
affinity purified from sera, are at best imperfect controls.
Immunoglobulins
also vary in glycosylation, disulfide bonding, and single
nucleotide
polymorphisms – including some that result in amino acid
substitutions that
affect Fc Receptor binding affinity. A recent (2015) trend
has been for
vendors, ex. Miltenyi Biotec REAfinity, to use the same
“backbone’ for their
entire product line antibodies.
The Fluorophore dyes section of
the table is
abridged from a 4700+ entry data table Excel file the
authors posted on the
internet,
https://works.bepress.com/gmcnamara/9 = PubSpectra.
the website download also
contains 400+ entry
fluorescent proteins data table Excel file. Spectra for many
of these dyes, and
commercial filters and light sources, are available through
an interactive
website at
http://www.spectra.arizona.edu/
QD### data from Quantum Dot Corp
(acquired by
Molecular Probes / Thermo Fisher). eVolve 605 and eVolve 655
are Cd containing
quantum dots from Affymetrix / eBiosciences (acquired by
Thermo Fisher). Bacteriochlorins
(BC’s) have small Stokes shifts (Emission maximum –
Excitation maximum). They
have almost as large extinction coefficients in the
ultraviolet, 350-390 nm
range, so for practical use have a huge, practical Stokes
shifts on the order
of 400 nm (they also have an additional excitation peak in
the 480-550 nm
range. Taniguchi et al (2008) include a graph comparing the
full width half
maxima (FWHM) emission spectra of Cyanine dyes (~50 nm),
near infrared quantum
dots (66 nm QD705, 74 nm QD800), BC’s (~20 nm), and
‘expanded’ porphyrins
(>120 nm). We suggest with the right excitation light
sources (355 nm laser
or ~360 and ~390 nm LEDs), and emission separation (filter
wheel one camera,
cascading filters to multiple cameras or PMTs), that four or
more BC’s could be
700-800 nm emission range. If a palette of five BC’s could
be closely
conjugated to Brilliant Blue BB515, excitation peak 488 nm,
extremely efficient
energy transfer in the visible absorption peaks (~500-550
nm) could enable
extreme multiplexing. Additional multiplexing may be gained
by 355 nm
excitation of BUV395 to five BC’s. Our thanks to Dr. Bruce
Pitner, NIRvana
Sciences, for discussions extinction
coefficient estimates with respect to NIRvana dyes and Taniguchi et al (2008) and Taniguchi and
Lindsey (2016)..
Additional dye data from Sednev et al
(2015, BioLegend, 2016, Brilliant Violets, http://www.biolegend.com/brilliantviolet
You
can look for updates at at www.GeoMcNamara.com.
***** To join, leave or search the confocal microscopy listserv, go to: http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy Post images on http://www.imgur.com and include the link in your posting. *****Hi George,As always super informative. Is it just me or do others also think that its high time someone invents a device download all that info that's sitting in your head...?
Very interesting comment about the diffusion radius of the activated TSA radical being less than the diffraction limit. I think that is a very important parameter. Just wondering if you know a reference for that?
Perkin Elmer recently showed some correlative fluorescence and EM data which suggests similar range of specificity for their TSA staining.
Thanks!
Sripad Ram
On Thu, Oct 13, 2016 at 11:24 AM, George McNamara <[hidden email]> wrote:
***** To join, leave or search the confocal microscopy listserv, go to: http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy Post images on http://www.imgur.com and include the link in your posting. *****Hi Claire,
Depending on temperature, constant reaction time may be bad. Minimal issue is always run on a warm plate (that is perfectly uniform temperature ... there are slide thermometers for this), incubators or ovens.
I suspect the TSA reaction runs to completion usually, with one of these running out:
* active HRP enzyme molecules (self destructs with some probability for every H2O2 catalytic cycle)
* tyrosine "docking sites" ... both in cells/tissues, the antibody molecules, and the HRPs (an advantage for poly HRP)
* fluorescent tyramide (least likely?)
* H2O2 (also unlikely?)
I believe PerkinElmer's Opal kits for multiplexing deliberately strips the detection Ab-polyHRP, before the next cycle, but have not been able to get data from PerkinElmer on this (and did not need TSA while I worked in a research lab here in Houston).
Many IHC reagent companies sell HRP polymers conjugated to streptavidin or secondary antibodies. For example
STREPTAVIDIN POLY-HRP80 CONJUGATE (plus stabilizer diluent)
https://www.fitzgerald-fii.com/streptavidin-poly-hrp80- conjugate-65r-s118.html
Yes, you can replace components in the kit with other reagents ... and conversely, use components in the kit for other purposes. An interesting "head to head" is fluorescent tyramide vs DAB IHC, or whatever favorite HRP substrate detection reagent your friendly neighborhood pathologists like.
I'm a big fan of TSA ever since Phil Moen of NEN (acquired by PerkinElmer) spoke about and demo'd it at a Cold Spring Harbor fluorescence in situ/immuno courses. Phil mentioned the diffusion radius of the activated tyramide radical is less than the diffraction limit of confocal microscopy (i.e. 100 nm radius, 200 nm diameter).
One potential limitation on quantitation: zero reactable tyrosines implies zero signal ... as I mentioned above, both the Ab and HRPs have tyrosines (some even on the surface if I recall correctly).
Big benefit: when done right, can dilute the primary antibody 100 fold (maybe more ... try it), saving money. In fact, failing to do so will result in massive background.
Automation: in principle, automating TSA should improve reproducibility (assuming constant temperature for the reaction, and either constant enzyme reaction time or "run to completion"). However, not paying attention to the cost of the reagents (or stability or lack thereof) could result in one well, $100 in reagents --> one slide).
One of my U Miami customers published a super-duper brightness CD4 and CD8 2 color T-cells (also CD4 and FoxP3) paper ... they killed off the HRP molecules (and before that, endogenous peroxidases) with a terrific product (both great name and works well): PeroxAbolish http://biocare.net/product/peroxabolish/
https://www.ncbi.nlm.nih.gov/pubmed/21929847
Cell Transplant. 2012;21(1):113-25. doi: 10.3727/096368911X586747. Epub 2011 Sep 16. Quantitative in situ analysis of FoxP3+ T regulatory cells on transplant tissue using laser scanning cytometry. Takahashi H(1), Ruiz P, Ricordi C, Delacruz V, Miki A, Mita A, Misawa R, Barker S, Burke GW, Tzakis AG, Ichii H. Author information: (1)Miami Transplant Institute, University of Miami Leonard M. Miller School of Medicine, Miami, FL, USA. There is abundant evidence that immune cells infiltrating into a transplanted organ play a critical role for destructive inflammatory or regulatory immune reactions. Quantitative in situ analysis (i.e., in tissue sections) of immune cells remains challenging due to a lack of objective methodology. Laser scanning cytometry (LSC) is an imaging-based methodology that performs quantitative measurements on fluorescently and/ or chromatically stained tissue or cellular specimens at a single-cell level. In this study, we have developed a novel objective method for analysis of immune cells, including Foxp3(+) T regulatory cells (Tregs), on formalin-fixed /paraffin-embedded (FFPE) transplant biopsy sections using iCys® Research Imaging Cytometer. The development of multiple immunofluorescent staining was established using FFPE human tonsil sample. The CD4/CD8 ratio and the population of Tregs among CD4(+) cells were analyzed using iCys and compared with the results from conventional flow cytometry analysis (FCM). Our multiple immunofluorescent staining techniques allow obtaining clear staining on FFPE sections. The CD4/CD8 ratio analyzed by iCys was concordant with those obtained by FCM. This method was also applicable for liver, small intestine, kidney, pancreas, and heart transplant biopsy sections and provide an objective quantification of Tregs within the grafts. DOI: 10.3727/096368911X586747 PMCID: PMC3777543 PMID: 21929847 [PubMed - indexed for MEDLINE]and my 2010 book chapter (Yuste 2010 CSHL Press chapter 15 - Imaging in Neurosciences) has a protocol (I would use Mol Probes/ThermoFisher or PerkinElmers ... can probably crosslink the Ab-HRPpolymer onto the cells/tissue instead of their strip).
I also want to acknowledge Molecular Probes - specifically Mike Janes and his team - for visiting Miami (several years ago) for a workshop featuring TSA and Bacmam2.0. Hopefully ThermoFisher still lets the Mol Probes folks out of the lab to do similar workshops.
Speculation (spectral-ation - I currently do not work in a lab, so not going to test this anytime soon -- maybe someone from Mol Probes can try it):
Single molecule localization staining ... or "rainbow single antigen counting by TSA" idea (this will be tedious to do by hand! Payoff: count everything):
=>I suggest using 35 mm imaging dish, so that wash steps can be very large volume (2 mL), and expensive reagent steps just the imaging area (7, 10, 14, 20, 28 mm diameter as appropriate for your expt).
1. incubate primary antibody at ~1/10th of saturation.
2. wash (extensively).
3. incubate secondary antibody-polyHRP.
4. wash extensively.
5. detect with Tyramide color #1.
6. kill HRP, i.e. with PeroxAbolish (http://biocare.net/product/peroxabolish/ ) AND I suggest gently crosslinking the 2ndAb-HRP-polymer into the specimen (see also Expansion Microscopy approaches).
7. OK, may want to image at this point, ideally with a way to refind the same place later.
*** Repeat 1-6 with different color, optionally also #7.
*. Image everything. See Valm et al https://www.ncbi.nlm.nih.gov/pubmed/27391327 for one example of high multiplexing (not tyramides) using all laser lines and detectors on a spectral confocal microscope.
I see in SuperBoost PDF only 7 colors (7 Alexa's)
https://tools.thermofisher.com/content/sfs/manuals/ tyramide_superboost_kits_man.
to get to 10 (ore more) could use biotin. A 1998 paper had do-it-yourself tyramide hapten synthesis
http://jhc.sagepub.com/content/46/6/771.full
Sure, could also do this single color, either add the signals, or photobleach. This could be useful on the MilliporeSigma/EMD Millipore/CellASIC ONIX microperfusion platform (since ONIX only has a few reservoirs and they seem to lack interest in making plates and manifolds for use with 2 or more controllers).
Another option for quantitation: wait for Garry P. Nolan (Stanford Univ.) to publish his immuofluorescence alternative to MIBI-ToF, or collaborate with him to use his MIBI-ToF or buy a Fluidigm imaging CyTOF.
enjoy,
George
On 10/13/2016 11:52 AM, Claire Brown, Dr. wrote:
***** To join, leave or search the confocal microscopy listserv, go to: http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy Post images on http://www.imgur.com and include the link in your posting. *****I wonder if anyone knows if the new ThermoFisher Tyramide SuperBoost kits are quantitative?
https://www.thermofisher.com/
order/catalog/product/B40915
I would assume that keeping the reaction conditions identical from sample to sample would be really important in stopping the HRP reaction after a fixed time but with such amplification is there any way relative signals could be quantified?
I would love to hear what people think.
Sincerely,
Claire
-- George McNamara, PhD Houston, TX 77054 [hidden email] https://www.linkedin.com/in/georgemcnamara https://works.bepress.com/gmcnamara/75/ http://www.ncbi.nlm.nih.gov/myncbi/browse/collection/ 44962650
-- George McNamara, PhD Houston, TX 77054 [hidden email] https://www.linkedin.com/in/georgemcnamara https://works.bepress.com/gmcnamara/75/ http://www.ncbi.nlm.nih.gov/myncbi/browse/collection/44962650
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