This allele from project TCPR0947 was generated at The Centre for Phenogenomics by electroporating Cas9 ribonucleoprotein complexes with single guide RNAs having spacer sequences of CCTTTGATTCTCGTACAAAC and TTGGCCACATATGTCTAAGT targeting the 5' side and CCACCCCATGTCTTTGCCAT and TAAGGATGCTTTCATGCAAG targeting the 3' side of a critical exon. This resulted in a 128-bp del Chr9: 80228855 to 80228982 (GRCm38). (J:265051)