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