Gluconegenesis in the Eel - VI. Effects of hepatectomy, alloxan, and mammalian insulin on the behavior of plasma amino acids. : Effects of Hepatectomy, alloxan, and Mammalian Insulin on the Behavior of Plasma Amino Acids

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The effects of hepatectomy, alloxan injection, and insulin injection on the behavior of plasma amino acids of the eel were studied. All the amino acids except α-amino-n-butylic acid, taurine, and citrulline increased in concentration following hepatectomy. Alloxan injection into non-hepatectomized eel produced increases in the concentrations of all the essential amino acids except lysine and histidine, while the nonessentials, excepting α-amino-n-butylic acid, proline, and tyrosine, were either not affected or decreased. In contrast to this, alloxan administration to hepatectomized eels produced marked increases in the concentrations of most amino acids including nonessentials which remained unchanged in alloxanized eels with the liver in situ. Insulin injection led to a decrease in the concentrations of all the plasma amino acids except citrulline. Plasma amino acids examined in the present experiment were tentatively classified into three groups according to their response to the experimental conditions.