UASt regulatory sequences drive expression of an inverted repeat.
Expression under the control of Scer\GAL4Mef2.PR results in early larval lethality.
Expression under the control of Scer\GAL4Mef2.PR results in grossly normal larval body wall muscles.
Expression under the control of Scer\GAL4Mef2.PR results in sarcomeres with discontinuous Z-lines in the larval body wall muscles.