Figure 21: A Photomicrograph of rat pancreatic tissue of the diabetic group immunostained for iNOS showing positive immunoreactivity in the inflammatory cells (blue arrows), and macrophage like cells (red arrows) infiltrating the islet. Positive immunoreactivity seen aslo in the degenerated islet cells (white arrow). Notice positive immunoreactivity in the endothelium of blood vessel (upper inset) and in some acinar cells (lower inset). (x1000).