agmatine causes a concentration-related ( 0.1-1.0 mm ) stimulation of insulin secretion by rat pancreatic islets exposed to d-glucose ( 5.6-11.1 mm ) but , like l-arginine , fails to affect insulin release either in the absence of glucose or at a high concentration ( 16.7 mm ) of the hexose .
C0017725
glucose
C0019494
hexose