This allele from project TCPR1302 was generated at The Centre for Phenogenomics by electroporating Cas9 ribonucleoprotein complexes with single guide RNAs having spacer sequences of CTGGTTCATAGAGGGCTAGG and CCTAACTCCTACATTATCAC targeting the 5' side and TCCACTTTAGGATGTGAACG and GAACTTTTTTGTATCCAAGT targeting the 3' side of a critical region. This resulted in a 729-bp del Chr11:67279720-67280448_insT and 6-bp del Chr11:67279605-67279610 (GRCm38).