label: a cytidine in mRNA + acetyl-CoA + ATP + H2O <=> an N(4)-acetylcytidine in mRNA + ADP + phosphate + CoA + H(+)
label_lc: a cytidine in mrna + acetyl-coa + atp + h2o <=> an n(4)-acetylcytidine in mrna + adp + phosphate + coa + h(+)