label: L-glutamyl-gamma-L-glutamyl-L-glutamyl-[protein] + ADP + phosphate + H(+) => gamma-L-glutamyl-L-glutamyl-[protein] + L-glutamate + ATP
label_lc: l-glutamyl-gamma-l-glutamyl-l-glutamyl-[protein] + adp + phosphate + h(+) => gamma-l-glutamyl-l-glutamyl-[protein] + l-glutamate + atp