Using an sgRNA (targeting ) and an ssODN template (GTCCAGCCCGTGGCCTCTCACCTGATAATTGCCAAGGGAATGAAGTACACCAGAAAGGCGACGATGGTCATGTACGGGGTCCAGTGCGAGTCATCCGGCCACAGTGCCCAGCACTGCACCTCACCATTGGAAAGTGTCCTTTTCCCAAATATGATCAGCGTGGGAATGGAGA) with CRISPR/Cas9 technology, exon 6 (coding for K161-S227) was deleted as a by-product of the intended p.Y206H mutation.