This allele from IMPC was generated at Bayor College of Medicine by injecting CAS9 Protein and 4 guide sequences CCTGGATGAGGCGCTCGCTGGCC, GCTTTTAATCATGCCTGAACTGG, CCAGCGCCAAGTAGAGGCCTCCC, TCTGCCCCGGCTCCCAAGAAGGG, which resulted in a Whole-gene deletion.