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Janelia Fluor® 549, SE
Biological Activity for Janelia Fluor® 549, SE
Janelia Fluor® 549, SE is a yellow fluorescent dye; supplied as an NHS ester for coupling to primary amine groups. NHS ester can be converted to relevant substrate for use in self-labeling tag systems, e.g. HaloTag® and SNAP-tag®. Suitable for confocal fluorescent imaging and super resolution microscopy (SRM) techniques, such as dSTORM (live and fixed cells) and STED. Also suitable for flow cytometry. Cell permeable. Excitation maximum = 549 nm; emission maximum = 571 nm; Quantum yield = 0.88; Extinction coefficient = 101,000 M-1cm-1; A280 correction factor is 0.169.
We also offer Janelia Fluor® conjugated antibodies and custom conjugation services with our sister company Novus Biologicals.
HaloTag is a trademark of Promega Corporation, and SNAP-tag is a trademark of New England BioLabs, Inc.
Sold under license from the Howard Hughes Medical Institute, Janelia Research Campus
Applications in Cardiac Tissue for Janelia Fluor® 549, SE
Application of Janelia Fluor® Dyes in Cardiac Tissue - Left - Widefield fluorescence image of muscle tissue from an adult pig heart, displaying the distribution of collagen VI in the interstitial space between muscle cells. The sample was labelled with a primary ab against collagen VI and a secondary ab conjugated to JF549 (#6147). Scale: 50 μm. Middle - An adult pig heart tissue section, 10 μm thick, labelled with abs against SERCA2ATPase, exhibits the intricate structure of the sarcoplasmic reticulum. A super-resolution image (top), obtained by exploiting spontaneous photo-switching of JF549 (dSTORM), shows superior detail to the diffraction limited widefield image (bottom). Scale: 200 nm. Right - A single isolated Wistar rat cardiomyocyte stained against α-actinin, displaying its periodic structure localised at the ends of sarcomeres (Z-discs). Widefield fluorescence of JF549 (left), prior to illuminating with a 561 nm laser to induce photoswitching and produce a dSTORM super-resolution image (right). Scale: 1 μm.
All images kindly provided by Prof. Christian Soeller, University of Exeter; acquired by Alex Clowsley and Anna Meletiou.
Optical Data for Janelia Fluor® 549, SE
|Extinction Coefficient (ε)||101,000 M-1cm-1|
|Quantum Yield (φ)||0.88|
|Closest Laser line||532 nm|
|Reactive Group||NHS ester|
|Correction Factor 280||0.169|
|Application||Confocal microscopy, Super Resolution Microscopy, Flow cytometry, dSTORM, STED microscopy|
|Alternative For||Alexa Fluor® 546, Alexa Fluor® 555, BDY TMR-X, Atto 550, CF 555, TAMRA, Cyanine 3|
Alexa Fluor® is a registered trademark of Molecular Probes, Inc, a Thermo Fisher Scientific Company.
Plan Your Experiments
Use our spectra viewer to interactively plan your experiments, assessing multiplexing options. View the excitation and emission spectra for our fluorescent dye range and other commonly used dyes.Spectral Viewer
Technical Data for Janelia Fluor® 549, SE
|Storage||Store at -20°C|
The technical data provided above is for guidance only. For batch specific data refer to the Certificate of Analysis.
Tocris products are intended for laboratory research use only, unless stated otherwise.
Solubility Data for Janelia Fluor® 549, SE
|Solvent||Max Conc. mg/mL||Max Conc. mM|
Preparing Stock Solutions for Janelia Fluor® 549, SE
The following data is based on the product molecular weight 551.56. Batch specific molecular weights may vary from batch to batch due to the degree of hydration, which will affect the solvent volumes required to prepare stock solutions.
|Concentration / Solvent Volume / Mass||1 mg||5 mg||10 mg|
|1 mM||1.81 mL||9.07 mL||18.13 mL|
|5 mM||0.36 mL||1.81 mL||3.63 mL|
|10 mM||0.18 mL||0.91 mL||1.81 mL|
|50 mM||0.04 mL||0.18 mL||0.36 mL|
Product Datasheets for Janelia Fluor® 549, SE
References for Janelia Fluor® 549, SE
References are publications that support the biological activity of the product.
Grimm et al (2015) A general method to improve fluorophores for live-cell and single-molecule microscopy. Nat.Methods 12 244 PMID: 25599551
Deng et al (2015) CASFISH: CRISPR/Cas9-mediated in situ labeling of genomic loci in fixed cells. Proc.Natl.Acad.Sci.USA. 112 11870 PMID: 26324940
Knight et al (2015) Dynamics of CRISPR-Cas9 genome interrogation in living cells. Science 350 823 PMID: 26564855
Legant et al (2016) High-density three-dimensional localization microscopy across large volumes. Nat.Methods 13 359 PMID: 26950745
If you know of a relevant reference for Janelia Fluor® 549, SE, please let us know.
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Citations for Janelia Fluor® 549, SE
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Protocols for Janelia Fluor® 549, SE
The following protocol features additional information for the use of Janelia Fluor® 549, SE (Cat. No. 6147).
Literature in this Area
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Fluorescent Probes and Dyes Research Product Guide
This product guide provides a comprehensive list and background to the use of Fluorescent Probes and Dyes
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