CRISPR/Cas9 mediated recombination targeting exons 2 and 3 with sgRNAs (targeting CGAGGTCTACCTTCAAGTCA and GGATGATGCAAGATACGGCA) created an insertion (AC) and deletion (CGTA) mutation in exon 2 resulting in a frameshift mutation at valine codon 99 (GTA) and a premature stop codon 60 nucleotides/20 codons downstream (Val99Leufs*20). (J:322160)