The occurrence of bis-(2-amino-2-carboxyethyl) trisulphide in hydrolysates of wool and other proteins

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Abstract
The sulphur-containing compound formed in highest yield by the decomposition of cystine during the acid hydrolysis of wool and other proteins has been identified as bis-(2-amino-2-carboxy-ethyl) trisulphide. Confirmation of identity was obtained by synthesis of the trisulphide by two different methods. Bis-(2-amino-2-carboxyethyl) trisulphide may be concerned in certain enzyme reactions involving sulphur. Another of the sulphur-containing compounds present in small amount in wool hydrolysates has been tentatively identified as bis-(2-amino-2-carboxyethyl) tetrasulphide.