Two TGC>GCC cysteine-to-alanine codon changes (p.C764A, p.C767A) were introduced using a pair of TALENs (TGATCACTTTGGCAATGCC, TACTGCAATGAGTGCTA) and an ssODN template (TGCGATCACTTTGGCAATGCCAAGTGTAATGGTTACGCCAATGAGGCCTACCAGTTTAAA plus left and right homology arms). (J:306576)