[Glu(-Cys)](n)-Gly + glutathione + H(+) = [Glu(-Cys)](n+1)-Gly + glycine
[glu(-cys)](n)-gly + glutathione + h(+) = [glu(-cys)](n+1)-gly + glycine
"glutathione gamma-glutamylcysteinyltransferase"
"glutathione gamma-glutamylcysteinyltransferase"