label: N-terminal N-acetyl-L-(Asp/Glu)3-[protein] + CoA + H(+) => N-terminal L-(Asp/Glu)3-[protein] + acetyl-CoA
label_lc: n-terminal n-acetyl-l-(asp/glu)3-[protein] + coa + h(+) => n-terminal l-(asp/glu)3-[protein] + acetyl-coa