We used immunofluorescence double staining method to investigate the cellular localization of glucagon and pancreatic polypeptide (PP) in rat pancreatic islets. The results showed that both A-cells (glucagon-secreting cells) and PP-cells (PPsecreting cells) were located in the periphery of the islets. However. A-cells and PP-cells had a different regional distribution. https://thebrickes.shop/product-category/natural-gas-conversion-kit/