This allele produced from project TCPR0367 at TCP by injecting Cas9 mRNA and two guide RNAs with the spacer sequences CTCTCTACCCAGCCTCGGGG and GCGCACCAGAGAAGGTCGAT. This resulted in a 5 bp deletion from Chr11:3215644 to 3215648 in ENSMUSE00001260265 (GRCm38).