In vivo formation of pyridoxal phosphate Schiff's base--an inherent defect in the tryptophan load test.
D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D011736:Pyridoxine / Q000494:pharmacology*; D014364:Tryptophan / Q000378:metabolism*; D014977:Xanthurenates / Q000652:urine*
D014977:Xanthurenates; D014364:Tryptophan; D011736:Pyridoxine