This allele from project TCPR1580 was generated at The Centre for Phenogenomics by electroporating Cas9 ribonucleoprotein complexes with single guide RNAs having spacer sequences of ATAGTGAACATTGCGCTGGG targeting the 5' side and ATCATCTTAAGGCACATCGC targeting the 3' side of a critical region. This resulted in a 1,557-bp del, Chr6:56888168-56889724 (GRCm38).