three-dimensional reconstructions of islets of langerhans , based on immunofluorescent staining of successive serial sections with antiserums to insulin , glucagon , somatostatin , and pancreatic polypeptide reveal a marked difference in the number of cells containing glucagon and pancreatic polypeptide depending on the anatomical location of the islet in the pancreas .
C0022131
of islets
C0030274
pancreas