label: N-terminal N(alpha)-acetyl-L-seryl-[histone H2A] + CoA + H(+) => N-terminal L-seryl-[histone H2A] + acetyl-CoA
label_lc: n-terminal n(alpha)-acetyl-l-seryl-[histone h2a] + coa + h(+) => n-terminal l-seryl-[histone h2a] + acetyl-coa