This allele from project TCPR1539 was generated at The Centre for Phenogenomics by electroporating Cas9 ribonucleoprotein complexes with single guide RNAs having spacer sequences of AAAGCATCAGAACGCAGTAC targeting the 5' side and CTAATGATGATTGCATGTAC targeting the 3' side of a critical region. This resulted in a 961-bp deletion, Chr6:149067791-149068751 (GRCm38).