Crawhall J C, Parker R, Sneddon W, Young E P, Ampola M G, Efron M L, Bixby E M
Science. 1968 Apr 26;160(3826):419-20. doi: 10.1126/science.160.3826.419.
beta-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.