Germ line, cre mediated recombination removed exon 7 and the neo cassette. Western blot analysis confirmed the production of two protein products from alternative spliced transcripts that fuses exon 6 to exon 8 (63 KDa) or exon 6 to exon 9 (49 KDa). Authors state that this is a hypomorphic allele. (J:152915)