gamma-L-glutamylputrescine + ADP + phosphate + H(+) => putrescine + L-glutamate + ATP
gamma-l-glutamylputrescine + adp + phosphate + h(+) => putrescine + l-glutamate + atp
gamma-L-glutamylputrescine + ADP + phosphate + H(+) => putrescine + L-glutamate + ATP
gamma-l-glutamylputrescine + adp + phosphate + h(+) => putrescine + l-glutamate + atp