This allele from project TCPR0837 was generated at The Centre for Phenogenomics by electroporating Cas9 ribonucleoprotein complexes with 4 single guide RNAs with spacer sequences of CACTTTAATCTAAGGCAAGA and GATTGCTGTAGGGCCATTGC targeting the 5' side and GTGATACCTACAGCATTCGG and GGTAGGACTTGTCTAAACAC targeting the 3' side of exon ENSMUSE00000591449 resulting in a 311-bp deletion of Chr7:82575904 to 82576214 (GRCm38).