This allele from project TCPR1495 was generated at The Centre for Phenogenomics by electroporating Cas9 ribonucleoprotein complexes with single guide RNAs having spacer sequences of TGGCTATTTGGTGGCTAATT and GTATGAGGTGTGTTTATCGG targeting a critical region. This resulted in a 2130-bp del Chr18: 37412012-37414141 (p.N47_S757del_insT) (GRCm38).