(2R)-2-amino-2-carboxylatoethyl-disulfanyl-oxopropanoate + H2O2 + NH4(+) => L-cystine + O2 + H2O
(2r)-2-amino-2-carboxylatoethyl-disulfanyl-oxopropanoate + h2o2 + nh4(+) => l-cystine + o2 + h2o
(2R)-2-amino-2-carboxylatoethyl-disulfanyl-oxopropanoate + H2O2 + NH4(+) => L-cystine + O2 + H2O
(2r)-2-amino-2-carboxylatoethyl-disulfanyl-oxopropanoate + h2o2 + nh4(+) => l-cystine + o2 + h2o