Janelia Fluor® 646, SE
Cat. No. 6148
Alternative Name: JF 646, NHS
Chemical Name: 1-[7-(1-Azetidinyl)-10-[2-carboxy-5
Biological ActivityFluorescent dye; supplied as an NHS ester for coupling to primary amine groups. Compatible with self-labeling tag systems (e.g. HaloTag® and SNAPtag® ). Suitable for confocal fluorescent imaging, super resolution microscopy (SRM) techniques such as dSTORM (live and fixed cells) and PAINT imaging. Can be multiplexed for two colour imaging with Janelia Fluor® 549 SE (Cat. No. 6147). Cell permeable. Excitation maximum = 646 nm; emission maximum = 664 nm. Quantum yield = 0.54, Extinction coefficient = 152,000 M-1cm-1; A280 correction factor is 0.19.
HaloTag is a trademark of Promega Corporation, and SNAP-tag is a trademark of New England BioLabs, Inc.
Licensing InformationSold under license from the Howard Hughes Medical Institute, Janelia Research Campus
Application of Janelia Fluor® Dyes in Cardiac Tissue
Super-resolution image (dSTORM) of muscle tissue from the left ventricle of an adult pig heart. JF646 (Cat.No. 6148) was used to label collagen VI, which is present on the cell plasma membrane, and imaged with a 642 nm excitation laser. A clearer structure is achieved in comparison with the widefield image (top right). Scale bar 2 μm.
Image kindly provided by Prof. Christian Soeller, University of Exeter; acquired by Alex Clowsley and Anna Meletiou.
The technical data provided above is for guidance only. For batch specific data refer to the Certificate of Analysis.
All Tocris products are intended for laboratory research use only.
Certificate of Analysis / Product Datasheet / Safety Datasheet
References are publications that support the products' biological activity.
Legant et al (2016) High-density three-dimensional localization microscopy across large volumes. Nat.Methods 13 359. PMID: 26950745.
Li et al (2016) Real-time imaging of Huntingtin aggregates diverting target search and gene transcription. Elife 5 e17056. PMID: 27484239.
Schmidt et al (2016) Live cell imaging reveals the dynamics of telomerase recruitment to telomeres. Cell 166 1188. PMID: 27523609.
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.
Grimm et al (2015) A general method to improve fluorophores for live-cell and single-molecule microscopy. Nat.Methods 12 244. PMID: 25599551.
Ticau et al (2015) Single-molecule studies of origin licensing reveal mechanisms ensuring bidirectional helicase loading. Cell 161 513. PMID: 25892223.
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