This allele from project TCPR1504 was generated at The Centre for Phenogenomics by electroporating Cas9 ribonucleoprotein complexes with single guide RNAs having spacer sequences of TGCTATTGAGGTCCTTCGCC targeting the 5' side and CCTCTCTGGGGCTACATTGT targeting the 3' side of a critical region. This resulted in a 646-bp del Chr17: 24513114-24513759 (GRCm38).