This Vsx2 enhancer was targeted with sgRNAs (AGCUGGAGUACCUACAUUGU and GUCUAGCUUGUGGAUUUCUU) and an ssODN template (TGTAATACCTGTAGTGGCCAGAAGAGGGCATCAGATCCCCAGGAGCTGGAGTACCTACATCTTTGGTTGGTGGTTCAGTCTCTGAGAGCCCCAGGGGCCCAGGTTTGTTGACTCTGTTGG) using CRISPR/Cas9 technology, resulting in a 3,922 bp deletion (chr12:84586536-84590457 GRCm39). (J:328714)