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Figure 7.Effect of glucose on glucagon and insulin release from the in vitro perfused rat pancreas. (Copyright 1974 by J Clin Invest. Republished with permission of J Clin Invest from Gerich et al: Characterization of the effects of arginine and glucose on glucagon and insulin release from the perfused rat pancreas. J Clin Invest 54:833-841, 1974.)