Clustered Regularly Interspaced Short Palindromic Repeat (CRISPR)/CRISPR-Associated Endonuclease Cas9–Mediated Homology-Independent Integration for Generating Quality Control Materials for Clinical Molecular Genetic Testing

Genome-edited human cell lines are important resources for producing quality control materials for clinical molecular genetic testing. Generating cell lines with defined mutations through homology-directed repair–based methods are inefficient and can lead to unwanted insertions and deletions in the target loci. Nonhomologous end joining in the clustered regularly interspaced short palindromic repeat (CRISPR)/CRISPR-associated endonuclease Cas9 (Cas9) system was harnessed to generate genome-engineered cell lines harboring target mutations.