The renal reabsorption of arginine, lysine and ornithine in the young cockerel (Gallusdomesticus)

1. 1. The renal reabsorption characteristics of arginine, lysine and ornithine have been studied in the young cockerel by renal clearance methods. 2. 2. Increasing the filtered load of any one of these amino acids by infusion caused a decrease in the efficiency of renal reabsorption of that amino acid and decreases in the efficiencies of reabsorption of the other two amino acids. 3. 3. It is probable that the cationic amino acids utilize a common transport system for renal reabsorption in the fowl.