Using an sgRNA (targeting TGACAATGATGGGTCTTCTGAGG) and an ssODN template (CTCCTCAGAGCTGAAACTCACCCAGGGAACCTAGAAACTCTCTGAGGCACCTCACCTGAAATGACAATGAGGGGTCTTCTGAGAATGTTGCTGAGGACAAATATGTGGATTTCTTCCAGGGAATTGTACTGAAGTCCACTTCGGGCTGCA) with CRISPR/Cas9 technology, isoleucine codon 207 (ATC) was changed to leucine (CTC) (c.619A>C, p.I207L). (J:283545)