Proline codon 195 was changed to alanine (c.583C>G p.P195A) using an sgRNA (targeting GCAAGGCAAGCTTCGCACCA) and an ssODN template with CRISPR/Cas9 technology. This mutation is the equivalent of the human p.P193A mutation associated with Aicardi-Goutieres syndrome (AGS). (J:325221)