Reaction catalyzed by 3-mercaptopyruvate sulfurtransferase (2.8.1.2)
+
=
+
2-oxo-3-sulfanylpropanoate
+
[3-mercaptopyruvate sulfurtransferase]-L-cysteine
=
pyruvate
+
[3-mercaptopyruvate sulfurtransferase]-S-sulfanyl-L-cysteine