This allele from project TCPR1560 was generated at The Centre for Phenogenomics by electroporating Cas9 ribonucleoprotein complexes with single guide RNAs having spacer sequences of TACAGTTCTCGGGCCGTAGA targeting the 5' side and TTAGGAAGCACGTACTAGCA targeting the 3' side of a critical region. This resulted in a 858-bp deletion Chr6:140534052-140534909 (GRCm38). (J:265051)