A new engineered version of the gene-editing CRISPR-Cas9 nuclease appears to robustly abolish the unwanted, off-target DNA breaks that are a significant current limitation of the technology, reducing them to undetectable levels. In their report receiving advance online publication in Nature, Massachusetts General Hospital (MGH) researchers describe how altering the Cas9 enzyme to reduce non-specific interactions with the target DNA may greatly expand applications of the gene-editing technology.
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High-fidelity CRISPR-Cas9 nucleases have no detectable off-target mutations
