Identification of the diketopiperazine of histidylproline in human urine.
D002852:Chromatography, Ion Exchange; D004035:Diet Therapy; D004151:Dipeptides; D006801:Humans; D066298:In Vitro Techniques; D007259:Infrared Rays; D010649:Phenylalanine; D010661:Phenylketonurias; D010879:Piperazines; D014556:Urine
D004151:Dipeptides; D010879:Piperazines; D010649:Phenylalanine