A 628G>A mutation was inserted in exon 7 and an FRT flanked neo cassette was introduced in intron 8 via homologous recombination. Flp mediated recombination removed the neo cassette. PCR analysis indicates the production of a shorter transcript with deletion of exon 7 resulting in a frameshift and premaure stop codon (p.V189NfsX8). (J:218616)