N-terminal L-methionyl-L-glutaminyl-[protein] + acetyl-CoA = N-terminal N(alpha)-acetyl-L-methionyl-L-glutaminyl-[protein] + CoA + H(+)
n-terminal l-methionyl-l-glutaminyl-[protein] + acetyl-coa = n-terminal n(alpha)-acetyl-l-methionyl-l-glutaminyl-[protein] + coa + h(+)