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Webinar: A virtual workshop for precise HDR-mediated genome engineering with CRISPR-Cas9


The use of CRISPR-Cas9 to create targeted double-strand breaks in genomic DNA has greatly simplified strategies for precise gene editing using the homology-directed repair (HDR) mechanism. This approach enables knock-in of fluorescent reporters, SNP repair, exact deletions, and many other genomic alterations. However, designing target-specific guide RNAs and DNA donor templates for achieving robust cleavage and repair has many challenges. In addition, the efficiency of HDR-mediated repair is often low. In this workshop, we will demonstrate the use of free, intuitive, online tools to design and order the necessary reagents to overcome these obstacles with HDR-mediated gene editing applications.

In this webinar you will learn:

  • Considerations for designing ideal guide RNAs and DNA oligo or plasmid repair templates for HDR-mediated CRISPR-Cas9 applications
  • Use of online tools for guide RNA and DNA repair templates for HDR-mediated gene editing applications
  • Optimization of experimental conditions to achieve robust gene editing
  • Demonstration of successful HDR-mediated CRISPR Cas9 experiments


maren mayer gross

Maren Mayer Gross is an R&D Scientist at Dharmacon, part of Dharmacon. She received her degree in Biochemistry and Molecular Biology at The College of Wooster in 2004 and joined Dharmacon in 2005. She has contributed to research projects and new product development in multiple areas across RNA interference and CRISPR-Cas9 genome engineering.

Additional Resources

CRISPR Design Tool

  • Place a custom guide RNA order, or design and order your own synthetic sgRNA, crRNA or lentiviral sgRNA with our easy-to-use interface.

HDR Donor Designer

  • Quickly and easily design and order a donor template for precise CRISPR-Cas9 gene editing!

Edit-R HDR Plasmid Donor Kits

  • Kit for assembly of a plasmid DNA EGFP, mKate2, or custom sequence HDR knock-in donor

Top 3 design tips for HDR ssDNA donor oligos

  • Considerations for design of a ssDNA donor for HDR. Learn how to design the best donor oligo for your experiment.

4 things to know for fluorescent protein tagging

  • Your cell line & target protein impact the success of fluorescent knock-in with HDR. Here’s what you need to know!