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iFluor® 546-streptavidin conjugate

Streptavidin conjugates are widely used together with a conjugate of biotin for specific detection of a variety of proteins, protein motifs, nucleic acids and other molecules since streptavidin has a very high binding affinity for biotin. This iFluor® 546-streptavidin conjugate comprises streptavidin (as the biotin-binding protein) with iFluor® 546 covalently attached (as the fluorescent label). It is commonly used as a second step reagent for indirect immunofluorescent staining, when used in conjunction with biotinylated primary antibodies. iFluor® 546-streptavidin conjugates has fluorescence excitation and emission maxima essentially identical to those of Alexa Fluor® 546 conjugates. These spectral characteristics make it an excellent alternative to Alexa Fluor® 546-streptavidin conjugate (Alexa Fluor® is the trademark of Invitrogen). It is a very valuable tool for biotin-streptavidin-based biological assays and tests. Under the same conditions we tested, iFluor® 546-streptavidin conjugate is brighter and more photostable than the corresponding Alexa Fluo® 546 conjugate. These spectral and labeling characteristics make the iFluor® 546 dye family a superior alternative to Alexa Fluor® 546.

Spectrum

Product family

NameExcitation (nm)Emission (nm)Extinction coefficient (cm -1 M -1)Quantum yieldCorrection Factor (260 nm)Correction Factor (280 nm)
iFluor® 350-streptavidin conjugate3454502000010.9510.830.23
iFluor® 405-streptavidin conjugate4034273700010.9110.480.77
iFluor® 488-streptavidin conjugate4915167500010.910.210.11
iFluor® 514-streptavidin conjugate5115277500010.8310.2650.116
iFluor® 532-streptavidin conjugate5375609000010.6810.260.16
iFluor® 555-streptavidin conjugate55757010000010.6410.230.14
iFluor® 594-streptavidin conjugate58760320000010.5310.050.04
iFluor® 633-streptavidin conjugate64065425000010.2910.0620.044
iFluor® 647-streptavidin conjugate65667025000010.2510.030.03
iFluor® 680-streptavidin conjugate68470122000010.2310.0970.094
iFluor® 700-streptavidin conjugate69071322000010.2310.090.04
iFluor® 750-streptavidin conjugate75777927500010.1210.0440.039
iFluor® 568-streptavidin conjugate56858710000010.5710.340.15
iFluor® 790-streptavidin conjugate78781225000010.1310.10.09
iFluor® 800-streptavidin conjugate80182025000010.1110.030.08
iFluor® 820-streptavidin conjugate82285025000010.110.16
iFluor® 840-streptavidin conjugate8368792000001-0.20.09
iFluor® 860-streptavidin conjugate85387825000010.10.14
Show More (9)

Citations

View all 1 citations: Citation Explorer
Overexpression of MACC1 and the association with hepatocyte growth factor/c-Met in epithelial ovarian cancer
Authors: Li, Hongyu and Zhang, Hui and Zhao, Shujun and Shi, Yun and Yao, Junge and Zhang, Yanyan and Guo, Huanhuan and Liu, Xingsuo
Journal: Oncology letters (2015): 1989--1996

References

View all 47 references: Citation Explorer
A streptavidin paramagnetic-particle based competition assay for the evaluation of the optical selectivity of quadruplex nucleic acid fluorescent probes
Authors: Largy E, Hamon F, Teulade-Fichou MP.
Journal: Methods. (2012)
Biotin-4-fluorescein based fluorescence quenching assay for determination of biotin binding capacity of streptavidin conjugated quantum dots
Authors: Mittal R, Bruchez MP.
Journal: Bioconjug Chem (2011): 362
Iminobiotin binding induces large fluorescent enhancements in avidin and streptavidin fluorescent conjugates and exhibits diverging pH-dependent binding affinities
Authors: Raphael MP, Rappole CA, Kurihara LK, Christodoulides JA, Qadri SN, Byers JM.
Journal: J Fluoresc (2011): 647
Streptavidin-Binding Peptide (SBP)-tagged SMC2 allows single-step affinity fluorescence, blotting or purification of the condensin complex
Authors: Kim JH, Chang TM, Graham AN, Choo KH, Kalitsis P, Hudson DF.
Journal: BMC Biochem (2010): 50
Determination of 17beta-oestradiol by fluorescence immunoassay with streptavidin-conjugated quantum dots as label
Authors: Sun M, Du L, Gao S, Bao Y, Wang S.
Journal: Steroids (2010): 400
Page updated on December 6, 2024

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Catalog Number16958
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Physical properties

Molecular weight

~52000

Solvent

Water

Spectral properties

Correction Factor (260 nm)

0.25

Correction Factor (280 nm)

0.15

Extinction coefficient (cm -1 M -1)

1000001

Excitation (nm)

541

Emission (nm)

557

Quantum yield

0.671

Storage, safety and handling

H-phraseH303, H313, H333
Hazard symbolXN
Intended useResearch Use Only (RUO)
R-phraseR20, R21, R22

Storage

Freeze (< -15 °C); Minimize light exposure
UNSPSC12352200
The excitation and emission spectra of iFluor<sup>TM&nbsp;</sup>546.&nbsp;
The excitation and emission spectra of iFluor<sup>TM&nbsp;</sup>546.&nbsp;
The excitation and emission spectra of iFluor<sup>TM&nbsp;</sup>546.&nbsp;