| Type | MGI:General | Description | mutants treated with tamoxifen to induce cre-recombination exhibit sustained myotonia, with waxing and waning myotonic runs noted on electromyogram mutants not treated with tamoxifen also develop myotonia, indicating basal leakiness of the transgene, however they do not show overt skeletal muscle wasting, histological abnormalities or muscle dysfunction as do tamoxifen treated mutants |