Dravet syndrome is a type of congenital epilepsy caused by nonsense mutations in the SCN1A gene in about 20% of cases; SCN1A gene encodes the alpha subunit of the voltage-gated sodium channel Nav1.1. Spanish researchers and their collaborators have developed a novel murine model of Dravet syndrome; the model was developed by CRISPR/Cas9-generated A>T point mutation at nucleotide 1837 that converts Arg613 to a STOP codon, and which was introduced into exon 12 of the murine Scn1a gene using 129S1/SvImJ embryos.