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