LGALS4 and myotonic dystrophy type 1: This system which facilitates the evaluation of tissue-specific mis-splicing [76] is based upon ‘spliceosensor’ flies that express DM1-relevant mini-genes in frame with a downstream firefly luciferase gene under the control of the UAS-Gal4 system targeted to muscle using a myosin heavy chain (MHC-Gal4) driver line [76].