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2 Janelia Publications

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    09/21/17 | Genomic probes.
    Singer RH, Deng W, Lionnet T
    USPTO. 2017 Sep 21;A1:

    Labeled probes, and methods of use thereof, comprise a Cas polypeptide conjugated to gRNA that is specific for target nucleic acid sequences, including genomic DNA sequences. The probes and methods can be used to label nucleic acid sequences without global DNA denaturation. The presently-disclosed subject matter meets some or all of the above identified needs, as will become evident to those of ordinary skill in the art after a study of information provided in this document.

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    09/19/17 | Synthesis of Janelia Fluor HaloTag and SNAP-Tag Ligands and Their Use in Cellular Imaging Experiments.
    Grimm JB, Brown TA, English BP, Lionnet T, Lavis LD
    Methods in Molecular Biology (Clifton, N.J.). 2017;1663:179-188. doi: 10.1007/978-1-4939-7265-4_15

    The development of genetically encoded self-labeling protein tags such as the HaloTag and SNAP-tag has expanded the utility of chemical dyes in microscopy. Intracellular labeling using these systems requires small, cell-permeable dyes with high brightness and photostability. We recently discovered a general method to improve the properties of classic fluorophores by replacing N,N-dimethylamino groups with four-membered azetidine rings to create the "Janelia Fluor" dyes. Here, we describe the synthesis of the HaloTag and SNAP-tag ligands of Janelia Fluor 549 and Janelia Fluor 646 as well as standard labeling protocols for use in ensemble and single-molecule cellular imaging.

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