Phenylalanine codon 72 (TTC) in exon 3 was changed to serine (TCC) (p.F72S) using an sgRNA (targeting AAGCAACTGAGAATTTCTTGG) and an ssODN template (CCATGTTTTGGCTGCATCTGTTGAACAAGCAACTGAGAATTCCTTGGAAAAGGGGGATAAAATTGCAAAAGAGAGCCAGT) with CRIPSR/Cas9 technology. The equivalent human mutation is found in some familial exudative vitreoretinopathy (FEVR) patients. (J:328283)