Using two sgRNAs (targeting GCGCCTGTGATAGTGCGCGT and CGCTGTTGTCCGTGCTTACG) with CRISPR/Cas9 technology, a 78 bp deletion (CTCTGGGCCGGTTGTCTCCAACGCGCACTATCACAGGCGCTTAGTAGATGTCGCTGTTGTCCGTGCTTACGCGGCCAG) was created in this Hoxd CTCF binding site region. (J:319862)