A mobile terminal having multiple touch panels and a touch panel operating method for the same are provided. Other aspects of the invention provide a variety of novel assays for screening candidate drugs. Each of the stacked gates has a control gate electrode crossing over the active region, a floating gate interposed between the control gate electrode and the active region, and an inter-gate dielectric layer interposed between the control gate electrode and the floating gate. Thus, the adapter enables the electrical package to be connected to conductors having a gap that is larger than the electrical package.