label: N-terminal N-acetyl-L-glutamyl-L-glutamyl-L-glutamyl-[protein] + CoA + H(+) => N-terminal L-glutamyl-L-glutamyl-L-glutamyl-[protein] + acetyl-CoA
label_lc: n-terminal n-acetyl-l-glutamyl-l-glutamyl-l-glutamyl-[protein] + coa + h(+) => n-terminal l-glutamyl-l-glutamyl-l-glutamyl-[protein] + acetyl-coa