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Isolation and structure determination of a new amino acid, alpha-amino-gamma, delta-dihydroxyadipic acid, from the hydrolysate of normal human urine.

A new acidic amino acid has been isolated from the hydrolysate of normal human urine. The chemical structure of the amino acid was determined to be alpha-amino-gamma, delta-dihydroxyadipic acid, based on its physical properties involving nuclear magnetic resonance, infrared and mass spectrometry as well as chemical degradation and chemical synthesis.