Using an sgRNA (targeting ATGCCACCAGGTAAGAGCTG) and an ssODN template (TTCTGTTCTTCTGGTCAGACCGCAGGAATCCACATGAAGTCCAGCCCTCCTATGCCACGAAGTAAGAGCTGGGGCCACAGTTCCTCTTCCAGGGTGCATACAAACCCCAGATCCCCG) with CRISPR/Cas9 technology, arginine codon 205 (AGG) was changed to lysine (AAG) (c.614G>A, p.R205K). This mutation affects the hydroxylase activity of the encoded protein. (J:322768)