This allele produced from project TCPR0384 at TCP by injecting Cas9 mRNA and two guide RNAs with the spacer sequences AGAGACGCCTGGCAGAGCGG and GGTCTTCTCGGATGACCTGC. This resulted in a 5-bp deletion in Chr12:88401979 to 88401983 and a 123-bp deletion in Chr12:88402032 to 88402154 (GRCm38).