Abstract
Clustered regularly interspaced short palindromic repeats (CRISPR)-Cas12a nucleases have emerged as a promising alternative to CRISPR-Cas9 in gene editing and expression regulation. However, the adoption of Cas12a has been hindered due to general off-target activities and limited efficiency. Here, we utilized a hybrid engineered Cas12a variant and hairpin-spacer crRNAs (h-CAP) to enhance the specificity and efficiency of the CRISPR-Cas12a system. Leveraging the h-CAP strategy, we demonstrate both single-base-specific and multiplex gene expression regulation in human cells.
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