Journal
CYTOGENETIC AND GENOME RESEARCH
Volume 160, Issue 3, Pages 156-165Publisher
KARGER
DOI: 10.1159/000506720
Keywords
Cas9; CRISPR-FISH; FISH; Mouse; RGEN-ISL; Soybean; Super-resolution microscopy
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Funding
- DFG [Ho1779/28-1]
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Visualizing the spatiotemporal organization of the genome will improve our understanding of how chromatin structure and function are intertwined. Here, we describe the further development of the RNA-guided endonuclease-in situ labeling (RGEN-ISL) method CRISPR-FISH. Using soybean and mouse chromosomes, we demonstrate that the treatment of conventionally fixed chromosomes (in ethanol or methanol:acetic acid) with 40 mM Tris-HCl (pH 9.0) for 30 minutes at 37 degrees C prior to CRISPR-FISH allows the application of this method for the detection of high-copy sequences. Wheat, rye, maize, andNicotiana benthamianawere used to confirm the applicability of the identified CRISPR-FISH conditions also in other species.
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