the azo dye 4- ( dimethylamino ) -4'-azobenzene ( dab ) thiosulfonate anion can serve as a sulfur-donor substrate for rhodanese ( thiosulfate : cyanide sulfurtransferase , ec 2.8.1.1 ) and for thiosulfate reductase ( ec unassigned ) with cyanide anion and gsh , respectively , as acceptor substrates .
C0010505
cyanide
C0003075
anion