This allele from project TCPR0984 was generated at The Centre for Phenogenomics by electroporating Cas9 ribonucleoprotein complexes with single guide RNAs having spacer sequences of GATCATAAAGGCGATGGTGC and GCAAGGCATCAAGCCCATAC targeting the 5' side and CCCGAATGGCCCACCACTGC targeting the 3' side of a critical region. This resulted in a 454-bp deletion Chr4:143396699 to 143397152; p.I82S*fs37 (GRCm38).