label: 4-aminobutanoyl-[BtrI ACP] + L-glutamate + ATP <=> 4-(gamma-L-glutamylamino)butanoyl-[BtrI ACP] + ADP + phosphate + H(+)
label_lc: 4-aminobutanoyl-[btri acp] + l-glutamate + atp <=> 4-(gamma-l-glutamylamino)butanoyl-[btri acp] + adp + phosphate + h(+)