The invention is directed to isolated promoters from stem-regulated, defense-inducible genes, such as JAS promoters. The window has an outer side, an inner side, and a frame portion about a perimeter of the window. In each case the pre-filter is positioned on the pleats so that dirt laden air is drawn through the pre-filter element and then through the pleated filter element before being drawn into a vacuum motor. The heat sink can include a core member from which fins extend.