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Hepatocyte. Glucose (G) is transported into the hepatocyte by the glucose transporter, GLUT2. Insulin receptor stimulation induces the formation of glycogen. Stimulation of either the β2-adrenergic or glucagon receptors induces cyclic-adenosine monophosphate (cAMP) and thereby protein kinase A (PKA). PKA activates glycogen phosphorylase (GPa) that induces the production of glucose from glycogen.
