An 1,163 bp deletion was generated with sgRNAs 5'-GAGATTCTACTCCTAAGCCC-3' and 5'-ATTCCCCGGGAAATAGCCCA-3' using CRISPR/Cas9 technology. This CpG island contains a bidirectional promoter for Hoxd1 and Haglr and also encompasses the first exons of both genes. (J:252916)