Vital for larval development. Plays a role in tumor formation. A crucial component for the physical link between integrins and the cytoskeleton in the epidermal muscle attachment sites. Interacts with the head domain of rhea and the kinase domain of Ilk. Expressed ubiquitously in all epithelial cells during early stages of embryogenesis. Specifically expressed at epidermal muscle attachment site. Expressed both maternally and zygotically throughout development. Muscle detachment in late-stage-16/early-stage-17 embryos. 'Wech' means 'detached' or 'gone' in German. Was originally termed dappled.