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A Multiplexed DNA FISH strategy for Assessing Genome Architecture in C. elegans

By Brandon D Fields, Son C. Nguyen, Guy Nir, Scott Kennedy

Posted 22 Aug 2018
bioRxiv DOI: 10.1101/397471

Eukaryotic DNA is highly organized within nuclei and this genomic organization is important for genome function. Fluorescent in situ hybridization (FISH) approaches allow the 3D architecture of genomes to be visualized. Scalable FISH technologies, which can be applied to whole animals, are needed to help unravel how genomic architecture regulates, or is regulated by, development, growth, reproduction, and aging. Here, we describe a multiplexed DNA FISH Oligopaint library that targets the entire C. elegans genome at chromosome, three megabase, and 500 kb scales. We describe a hybridization strategy that provides flexibility to DNA FISH experiments by coupling a single primary probe synthesis reaction to dye conjugated detection oligos via bridge oligos, eliminating the time and cost typically associated with labeling probe sets for individual DNA FISH experiments. The approach allows visualization of genome organization at varying scales in all/most cells across all stages of development in an intact animal model system.

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