A nucleotide substitutions in exon 3 resulted in the amino acid substitution of methionine for threonine at position 190 (T190M). This mutation corresponds to the T192M mutation identified in humans with Limb-Girdle Muscular Dystrophy. A floxed neo cassette was inserted upstream of exon 3 and was removed by cre mediated recombination. (J:169291)