Pancreatic islets prelabelled with either 86Rb or 45Ca were perifused in the presence of propranolol (0.1 microM) and, when required, exposed to epinephrine (0.1 microM). In the absence of D-glucose, epinephrine failed to cause any obvious change in either 86Rb or 45Ca outflow. In the presence of 16.7 mM D-glucose, however, epinephrine lowered both 86Rb and… (More)
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