Beta Mercaptolactate-Cysteine Disulfide: Analog of Cystine in the Urine of a Mentally Retarded Patient

Science  26 Apr 1968:
Vol. 160, Issue 3826, pp. 419-420
DOI: 10.1126/science.160.3826.419


β-Mercaptolactate-cysteine disulfide, a hitherto undescribed analog of cystine, was isolated from the urine of a mentally retarded patient. The propertis of this substance are described, and its structure is confirmed by mass spectrometry and by partial synthesis.